AIRCRAFT ABBREVIATIONS & ACRONYMS

AIRCRAFT ABBREVIATIONS & ACRONYMS

A Ampere A Amber A Area A Alternate A Altitude A Air A Angstrom AA Arithmetical Average AA Autopilot Annunciator AAAS Alternative Audio Alert Select AACD Aging Airplane Corrosion Document AACP Aging Airplane Corrosion Program AACU Antiskid/Autobrake Control Unit AADF Angle of Attack Averaging Defeat AADS Analog Air Data System AAI Air-to-Air Identification AAIB Air Accidents Investigation Branch AAIP Analog Autopilot Improvement Program AAL Above Aerodrome Level AALS Altitude Acquire Level Switch AAM Autopilot Actuator Monitor AAS Airport Advisory Service A-ATCK Angle of Attack AATF Airworthiness Assurance Task Force AAU Audio Accessory Unit AAWG Airworthiness Assurance Working Group AB All Base A/B Autobrake ABBR Abbreviation ABM Abeam ABN Airborne ABNORM Abnormal ABS Autobrake System ABS Absolute ABSCU Auto Brake System Control Unit ABSORB Absorber ABSV Alternate Brake Selector Valve ABS VAL Absolute Value ABU Audio Balancing Unit ABV Above AC Alternating Current AC Aircraft AC Altitude Capture AC Automated Customized AC Advisory Circular (FAA) A/C Aircraft A/C Air Conditioning A*C Aircraft ACARS Arinc Communications, Addressing & Reporting System ACAU Air Conditioning Accessory Unit ACB Airplane Configuration Bulletin ACC Accessory ACC Accelerometer ACC Area Control Center ACC Active Clearance Control ACCEL Accelerate, Acceleration ACCEL Accelerometer ACCESS Accessory ACCLRM Accelerometer ACCU Accumulator ACCUM Accumulator ACCY Accessory ACDB Airport Characteristics Data Bank ACDO Air Carrier District Office ACE Altimeter Control Equipment ACE Air Cargo Equipment ACE Actuator Control Electronics

ACEM Aircraft Equipment Modification ACESS Advanced Cabin Entertainment Service System ACFI Advisory Committee on Flight Information (FAA) ACFT Aircraft ACIA Asynchronous Communications Interface Adaptor ACIC Aeronautical Chart and Information Center ACK Acknowledge, Acknowledgment ACLOR Aileron Command Limit Override ACLS Altitude Capture Level Switch ACM Air Cycle Machine ACM Aileron Centering Mechanism ACMF Airplane Condition Monitoring Function ACMP Alternating Current Motor Pump ACMS Aircraft Condition Monitoring System ACMS Airplane Condition Monitoring System ACN Aircraft Classification Number ACO Aircraft Certification Office (FAA) ACOB Automatic Call Out Box ACOC Air Cooled Oil Cooler ACP Audio Control Panel ACP Altimeter Check Point ACQ Acquire, Acquisition ACQN Acquisition ACRU Avionics Cooling Refrigeration Unit ACS Air Conditioning System ACS Access ACS Active Control System ACS Airplane Configuration System ACS ACESS Configuration System ACSU Advanced Central Switching Unit ACT Active ACT Activity ACT Actual ACT Actuator ACTD Actuated ACTG Actuating ACTN Action ACTR Actuator ACTVT Activate ACU Antenna Coupler Unit ACU Acceleration Control Unit ACU Annunciator Control Unit ACU Auxiliary Control Unit ACV Altitude Capture Validity ACVR Alternating Current Voltage Ratio AD Airworthiness Directive (FAA) AD Aerodrome AD Airplane Datum A/D Analog-to-Digital ADAMS Airborne Data Analysis and Monitor System ADAS Auxiliary Data Acquisition System ADAU Auxiliary Data Acquisition Unit ADC Air Data Computer A/DC Analog to Digital Converter ADCN Advanced Drawing Change Notice A/D CONV Analog to Digital Converter ADD Addition ADF Automatic Direction Finder ADG Air Driven Generator ADI Attitude Director Indicator ADIF ADI Flag Inhibit ADIRS Air Data Inertial Reference System ADIRU Air Data Inertial Reference Unit ADIS Automatic Data Interchange System ADJ Adjust, Adjustable, Adjustment ADJMT Adjustment ADL Airborne Data Loader ADM Air Data Module

1 REV. OCT. 00


ADP Air Driven Pump ADP Automatic Data Processing ADPTN Adaptation ADPTR Adapter ADR Advisory Route ADRS Address ADS Air Data System ADS Audio Distribution System ADU Align Display Unit ADU Air Drive Unit ADV Advisory AEA Association of European Airlines AEB Airline Engineering Bulletin AEEA Aft Electronics Equipment Area AEEC Airlines Electronic Engineering Committee AEG Aircraft Evaluation Group (FAA) AEM Audio Entertainment Multiplexer AEP Audio Entertainment Player AERNO Aeronautical Equipment Reference Number AERO Aerodynamic AERODYN Aerodynamic AES Aircraft Earth Station AESC Aft Electronic Service Center AEW Airborne Early Warning AEX Access Authorized AF Audio Frequency AF All Freighter AF DME Arc to Fixed Waypoint AF Align Fader Switch Logic AF Air Force Standards A/F Auto Flight A/F Autofeather AFB Antifriction Bearing AFC Automatic Frequency Control AFC Automatic Flight Control AFCR Air Flow Control Regulation AFCS Automatic Flight Control System AFCS Avionic Flight Control System AFD Automatic Flight Director AFDC Autopilot Flight Director Computer AFDS Autopilot/Flight Director System AFL Air Flow AFL Aileron Force Limiter AFM Airplane Flight Manual AFMC Advanced Flight Management Computer AFM-DPI Airplane Flight Manual-Digital Performance Information AFOLTS Automatic Fire Overheat Logic Test System AFQGS Advanced Fuel Quantity Gauging Sytem AFR Airframe AFS Autoflight System AFS Aging Fleet Survey AFSC Ancillary Fuel System Controller AFT Aftward AFT After AFTN Aeronautical Fixed Telecommunication Netword AFTR After AG Approach Gate A/G Air/Ground AGB Accessory Gearbox AGC Automatic Gain Control AGCU Auxiliary Generator Control Unit AGIS Air/Ground Indication System AGL Air to Ground Level AGL Above Ground Level AGMT Augment AGR Auxiliary Generator Relay AGS Automatic Ground Spoilers

AGS Air/Ground System AGSB Auto Ground Speed Brake AGSS Air/Ground Safety Sensor AGT Agent AGW Actual Gross Weight AH Alert Height AH Ampere Hour AHE Altitude Hold Engaged AHG Altitude Hold Good AHP Anti Hijacking Panel AHRS Attitude Heading Reference System AHRU Attitude and Heading Reference Unit AHS Altitude Hold Selected AI Anti-Icing AI Accuracy Index AI Analog Input A/I Anti-Ice AIA Aerospace Industry Association AIA American Institute of Aeronautics AIAA American Institute of Astronautics and Aeronautics AICC Aviation Industry CBT Committee AID Aircraft Installation Delay AIDS Aircraft Integrated Data System AIG Accident Investigation AIL Aileron AIM Action Item-Miscellaneous AIM Acknowledgement, ISO alphabet numbers and Maintenance AIMS Airplane Information Management System AIP Aeronautical Information Publication AIR Airplane Airborne AIR COND Air Conditioning AIRGND Air/Ground AIR/GRD Air/Ground AIRS Airline Inventory Redistribution System AIRSPD Airspeed AIS Aeronautical Information Service AISI American Iron and Steel Institute AITI Area Inspection Task Items AIV Accumulator Isolation Valve AJ Assembly Jig AL Alumel AL Autoland Al Aluminum A/L Approach/Land A/L Autoland ALC Automatic Load Control ALCMD Autoland Command ALCS Autopilot Lateral Control Servo ALDB Airline Database ALERFA Alert Phase ALICS Airline Inventory Control System ALIGN Alignment ALIM Align Mode ALM Alarm ALN Align ALPHA Angle of Attack ALPHA Minimum Speed Control Mode ALPHANUM Alphanumerical ALR Alert ALS Aft Limit Switch ALS Approach Light System ALS Aircraft Landing Systems ALT Altitude ALT Altimeter ALT Alternate ALT ACQ Altitude Acquire

2 REV. OCT. 00


ALT A/P Alternate Autopilot ALT CAP Altitude Capture ALT CAPT Altitude Capture ALT HOLD Altitude Hold ALTM Altimeter ALTN Alternate ALTNT Alternate ALTRK Approach Land Track ALT SEL Altitude Select ALT-T Altitude Trip (Takeoff, GA) ALT TO Alternate To ALU Arithmetic and Logic Unit ALV Autoland Validity AM Amplitude Modulation Am Amercium AMB Ambient AMB Amber AMB Aircraft Maintenance Base AMC Acceptable Means of Compliance AMETS Airplane Maintenance Engineered Time Standards AMI Airplane Modifiable Information AMLCD Active Matrix Liquid Crystal Display AMM Ammeter AMM Aircraft Maintenance Manual AMOC Alternate Means of Compliance (FAA) AMP Amperes, Amperage AMP Amplifier AMP HR Ampere-Hour AMPL Amplifier AMPL Amplitude AMPU Aircraft Modular Power Unit AMRE Airplane Maintenance and Repair Engineering AMRN Advance Modification Revision Notice AMS Aeronautical Material Specifications AMS Aerospace Material Specification AMS American Material Specifications AMT Amount AMTI Airborne Moving Target Indicator AMTOSS Aircraft Maintenance Task Oriented Support System AMU Audio Management Unit AMUX Audio Multiplexer AN Air Navigation AN Normal Acceleration AN Army-Navy Standard AN Air Force-Navy Aeronautical Standards A/N Autonetics ANAL Analysis ANAV Automated Navigation ANCDU Alternate Navigation Control Display Unit ANCPT Anticipate ANCPTR Anticipator AND Aircraft Nose Down ANG Angle ANLG Analogic ANN Annunciator ANNCT Announcement ANN LT Annunciator Light ANNUN Annunciator ANNUNC Annunciator ANPT Aeronautical National Taper Pipe Threads ANPT American National Pipe Thread ANS Alternate Navigation System ANS Ambient Noise Sensors ANSI American National Standards Institute ANT Antenna ANTI-COLL Anti-Collision

ANU Aircraft Nose Up AO Access Opening AOA Angle Of Attack AOA Angle Of Airflow AOAS Angle Of Attack Sensor AOB All Overseas Base AOC Approach On Course AOC Air Oil Cooling AOE Automatic Overwing Exit AOG Aircraft On Ground AOL All Operators Letters AOM Aircraft Operating Manual AOX Air/Oil Cooler AP Autopilot AP Airborne Printer AP Airport AP Auxiliary Power A/P Autopilot A/P Airplane A&P Airframe and Powerplant APB Auxiliary Power Breaker APB APU Breaker APCH Approach APCMD Autopilot Command APCS Autopilot Pitch Control Servo APCU Auxiliary Power Control Unit APD Approach Progress Display APE Autopilot Engaged AP/FD Autopilot/Flight Director APFDS Autopilot Flight Director System APFE Autopilot First Engaged API Angle Position Indicator API Air Position Indicator APID Airplane Identification APL Airplane APL Assembly Parts Lists APM Airplane Performance Monitoring APNFF Autopilot No First Failure APP Approach APP Appearance APPC Approach Control APPD Approach Disconnect APPD Approved APPE Approach Engage APPLE Approach Land Engaged APPR Approach APPROX Approximately APR Approach APR Automatic Performance Reserve APR Auxiliary Power Relay APRCH Approach APRT Airport APS Aircraft Prepared for Service APS Auxiliary Power Supply APS APU Power Switch APSE Autopilot Servo Engaged APT Airport APU Auxiliary Power Unit APUC Auxiliary Power Unit Controller APUCU APU Control Unit APUIC APU Interface Card AQS Advanced Quality System AR As Required AR Approved Repairs A/R Altitude Rate A&R Assembly and Repair ARAC Aviation Rule-making Advisory Committee ARB Air Registration Board

3 REV. OCT. 00


ARC Automatic Rollout Control ARGS Autopilot Rollout Guidance Servo ARINC Aeronautical Radio Incorporated ARINC STP ARINC I/O UART data Strip ARMD Armed ARMG Arming ARND Around ARO After Receipt Order ARP Aerodrome Reference Point ARP Airport Reference Point ARP Aeronautical Recommended Practices ARPT Airport ARR Arrival, Arriving ARRA Arizona Radiation Regulatory Agency ARSR Arrestor ART Active Repair Time ART Auto Reserve Thrust ARTCC Air Route Traffic Control Center ARTCLD Articulated ARTF Artificial ARTS Aircraft Recovery Transportation System ARU Altitude Rate Unit AS Altitude Select AS Airspeed AS Airscoop AS Aerospace Standards A/S Airspeed A/S Antiskid A/S Auto Stabilization ASA Autoland Status Annunciator ASA All Speed Aileron ASAE Altitude Select Arm Engaged ASAERST Altitude Select Arm Engaged Reset ASAP As Soon As Possible ASAS Airborne Separation Assurance System ASAS Altitude Select Arm Selected ASAS Abnormal Start Advisory System ASAT Automated Spar Assembly Tool ASC Automatic Sensitivity Control ASC Aural Synthesizer Card ASCD Ascend ASCII American Standard Code for Information Interchange ASCPC Air Supply and Cabin Pressure Controller ASCS Air Supply Control System ASCTU Air Supply Control and Test Unit ASCU Anti Skid Control Unit ASD Accelerate Stop Distance ASE Airborne Support Equipment ASE Airspeed Error ASE Airline Support Engineer ASE Auto Slat Extend ASF Amperes per Square Foot ASG ARINC Signal Gateway ASG APU Starter Generator ASI Airspeed Indicator ASI Air Safety Investigation A/SKID Anti Skid ASM American Society for Metals ASM Airspeed Mode ASM Autothrottle Servo Motor AS/M Airspeed/Mach ASME American Society of Mechanical Engineers ASN Assigned System Number ASN Airplane Serial Number ASP Audio Selector Panel ASP Altitude Select Panel ASP Aspirated (tat probe)

ASPD Airspeed ASR Airport Surveillance Radar ASS Auxiliary Spar Station ASSEM Assemble ASSY Assembly AST Automatic Stabilizer Trim A/STAB Auto Stabilizer ASTM American Society for Testing and Materials ASTP Automatic Stabilizer Trim Potentiometer ASTU Automatic Stabilizer Trim Unit ASU Attendant Service Unit ASU APU Starter Generator ASWC Advanced Stall Warning Card ASYM Asymmetry ASYM Asymmetric, Asymmetrical AT Autothrottle A/T Autothrottle A/T Adjustment/Test A&T Assembly and Test ATA Air Transport Association ATA Actual Time of Arrival ATB Air Turn Back ATC Air Traffic Control ATC Accelerometer Test Complete ATCH Attach, Attachment ATCK Attack ATCN Advance Tool Change Notice ATCRB Air Traffic Control Radar Beacon ATCRBS Air Traffic Control Radar Beacon System ATCSS Air Traffic Control Data Link Signaling System ATCT Air Traffic Control Tower ATE Automatic Test Equipment ATE Automated Test Equipment ATE Auto Throttle Engaged ATEC Automatic Test Equipment Complex AT ENG Auto Throttle Engaged A/THR Automatic Thrust ATI Advanced Technology Interior ATI Auto Throttle Inhibit ATIS Air Terminal Information Service ATIS Automatic Terminal Information Service ATLAS Abbreviated Test Language for Avionics Systems ATM Air Turbine Motor ATM Available Ton-Mile ATM Atmosphere ATMS Advanced Text Management System ATOR Auto Throttle Override ATR Austin-Trumbull-Radioracking ATR Automatic Thrust Restoration ATR Auto Tune Radio ATS Auto-Throttle System ATS Auto Throttle Servo ATS Automatic Test Station ATS ACESS Test System ATSCV Air Turbine Starter Control Valve ATSD Auto Throttle Servo Disconnect ATSEL Altitude Select ATT Attitude ATT Flight Attendant ATTC Automatic Takeoff Thrust Control ATTD Attitude ATTEN Attenuation, Attenuator ATTEND Attendant ATTF Attitude Flag ATTN Flight Attendant ATTN Attention ATTND Flight Attendant ATT REF Attitude Reference

4 REV. OCT. 00


ATV Auto Trim Valid ATZ Aerodrome Traffic Zone AUD Audio AUD Audible AUG Augment, Augmentation AUT Automatic AUTH Authorize, Authority AUTO Automatic AUTOCAL Autocalibration AUTODADS Automatic Digital Air Data Computer Selection AUTOLAND Automatic Landing AUW All-Up Weight AUX Auxiliary AV Average AV Altitude Hold Validity AVAIL Available AVC Automatic Volume Control AVG Average AVIONICS Aviation Electronics AVM Airborne Vibration Monitor AVN Aviation AVNCS Avionics AVPAC Aviation VHF Packet Communications AVRS Audio/Video Recording System AVS Audio Visual System AVSAT Aviation Satellite AVT Audio Visual Training AVT Audio Visual Tutorial AWACS Airborne Warning And Control System AWB Air Way Bill AWG American Wire Gauge AWG Audible Warning Generator AWLS All Weather Landing System AWN Airworthiness Notice AWOS Automatic Weather Observing System AWS American Welding Society AWU Aural Warning Unit AWY Airway AX Access Authorized AX Longitudinal Acceleration A/XFMR Autotransformer AY Lateral Acceleration AY Assembly AZ Azimuth AZ Vertical Acceleration AZFW Actual Zero Fuel Weight

B Blue B Both BA Bundle Assembly BA Balance Arms B/A Bank Angle BAC Boeing Standards BACD Boeing Design Detail BACS Bleed Air Control System BAF Baffle BAL Balance BAL Basic Assembly Language BALTI Inertial Barometric Altitude BAP Bank Angle Protection BAR Barometric, Barometer BAR Barometric Altitude Rate BAR Bleed Air Regulator BARC Barometric Altitude Rate Computer BARF Barometric Altitude Rate Flag BARO Barometric BAT Battery BATT Battery BAV Bleed Air Valve BB Bar Bias BB Broad Band BB Ball Bearing B/B Back Beam BBL Body Buttock Line BBRG Ball Bearing BC Back Course BC Baggage Container BCAA British Civil Aviation Authority BCAG Boeing Commercial Airplane Group BCAR British Civil Airworthiness Requirements BCAS Beacon Collision Avoidance BCD Binary Coded Decimal BCF Bromochlorodifluoromethane BCK Back BCLM Baggage/Cargo Loading Manual BCN Beacon BCR BOECOM Change Report BCRS Backcourse B/CRS Backcourse BCS Block Check Sequence BCS Boeing Computer Services BCSM Boeing Customer Services Manager BCSR Boeing Customer Services Representative BCU Bus Control Unit BCU Battery Control Unit BCU Brake Control Unit BCV Bore Cooling Valves BD Beginning of Descent BD Board B/D Bottom of Descent B/D Bearing/Distance BDL Bundle BDS Boeing Design Standard BDY BLK Burndy Block Be Baume BED Beam Error Detector (glideslope) BEL CRK Bellcrank BER Beyond Economical Repair BETA Sideslip Suppression System BETA Angle of Sideslip BETW Between BEV Bevel BEW Basic Empty Weight BFDAS Basic Flight Data Acquisition System BFE Buyer Furnished Equipment

5 REV. OCT. 00


BFO Beat Frequency Oscillator BFR Buffer BFR Before BFS Boeing Field Service BG Body Gear BG Build Group BGC Build Group Component BGM Boarding Music BGS Build Group Stack-up BGW Basic Gross Weight BH Brinell Hardness BHD Bulkhead BHE Bank Hold Mode Engaged BHN Brinell Hardness Number BHP Brake Horsepower BHP-HR Brake Horsepower Hour BIFI Bifurcation BIFUR Bifurcation BIST Built in Self Test BIT Built-In-Test BITE Built-In-Test-Equipment BK Brake BK Black BK Book BKGD Background BKGRD Background BKR Breaker BL Buttock Line BL Bleed BL Brake Lever B/L Blue Line BLC Boundary Layer Control BLD Bleed BLDG Building BLG Body Landing Gear BLK Black BLKHD Bulkhead BLKT Blanket BL-L Buttock Line Left BL-R Buttock Line Right BLO Buttock Line Zero BLO Below BLO Blower BLS Bezel Light Sensor BLSA Beam Level Switch A BLSB Beam Level Switch B BLST Ballast BLT Bolt BLU Blue BLV Bleed Valve BLW Below BM Beam BM Back Course Marker BM Bulk Material BMEP Brake Mean Effective Pressure BMS Boeing Material Specification BMT Boeing Materials Technology BMV Brake Metering Valve BND Bonded BNDG Bonding BNDRY Boundary BNR Binary BNR Binary Numerical Reference BNY Binary BO Blocking Oscillator BOD Bottom Of Descent BOECOM Boeing Communications BOH Break-Off Weight

BOLD Boeing On Line Data BOT Bottom BOT Beginning Of Tape B/OUT Breakout BOV Bar Out of View BOV Biased Out of View BP Bandpass BP Bottom Plug BP Blueprint BP Baseline Program BPCU Bus Power Control Unit BPI Brake Pressure Indicator BPI Boeing Process Instruction BPP Bus Protection Panel BPS Boeing Part Specifications BR Buildup Relay BR Brown BRC Brace BRD Braid BRD Boarding BRDG Bridge BRG Bearing BRIL Brilliance BRK Brake BRKR Breaker BRKRS Breakers BRKS Brakes BRKT Bracket BRN Brown BRP Body Reference Plane BRT Bright, Brightness BRZ Bronze BS Body Station BSC Basic BSCU Brake System Control Unit B/SEC Bits per Second BSHG Bushing BSOPM Boeing Standard Overhaul Practices Manual BSS Boeing Support Standard BSSI Boeing Support Services International BST Boost BSTA Body Station B STA Body Station BSU Beam Steering Unit BSV Burner Staging Valve BSWPM Boeing Standard Wiring Practices Manual BSY Busy BT Bus Tie BT Bogie (truck) Tilt BTB Bus Tie Breaker BTBS Bus Tie Breakers BTC Bus Transfer Contactor BTL Bottle BTLCS Brake Torque Limiting Control System BTMU Brake Temperature Monitor Unit BTN Button BTN Boeing Telecommunications Network BTR Bus Tie Relay BTRY Battery BTS Boeing Technology Services BTU British Thermal Unit BU Battery Unit BU Back Up BUCCS Boeing Uniform Classification and Coding System BUG Reference Marker (A/S or EPR) BUT Button BVA Bleed Valve Actuator

6 REV. OCT. 00


BVA Bleed Valve Angle BVCU Bleed Valve Control Unit BWL Body Water Line BYP Bypass BZO Benzyl Peroxide

C Common C Centigrade, Celsius (degrees) C Center C Cold C Clear C Close C Captain C Convertible C Cyan C Comparator C Capacitor CA Cable CAA Civil Aviation Authority CAA Civil Airworthiness Administration CAB Cabin CAB Civil Aeronautics Board CAB PRESS Cabin Pressurization CAC Caution Advisory Computer CAC Center Accessory Compartment CACC Cargo Air Conditioning Card CACP Cabin Area Control Panel CACTCS Cabin Air Conditioning and Temperature Control System CACV Condition Air Check Valve CAD Computer Aided Design CAD Central Air Data CAD Cadmium CADC Central Air Data Computer CADS Central Air Data System CAE Computer Aided Engineering CAF Coarse Alpha Fail CAGE Commercial And Government Entity CAH Cabin Attendant Handset CAI Combustion Area Inspection CAI Cabin Altitude Indicator CAL Calibrate, Calibration CAL Comparator Autoland CAL Comparator Aileron CALC Calculate CALC Cargo Acceptance and Load Control CALIB Calibrator CALSEL Call Select CAM Camera CAM Computer Aided Manufacturing CAM Crew Alertness Monitor CAN Canopy CAN Comparator Accelerometer CANC Cancel, Cancelled CANTIL Cantilever CAO Cargo Aircraft Only CAP Capture CAP Capacitor CAP Capacity CAP Cap and Stow CAPLTY Capability CAPT Captain CAR Cargo CAR Computer Aided Recertification CAR Civil Air Regulation CARP Carpet CARR Carrier CAS Computed Air Speed CAS Calibrated Air Speed CAS Calculated Air Speed CAS Collision Avoidance System CAS Customer Assembled Spare CASS Casserole CASV Computed Airspeed Validity

7 REV. OCT. 00


CAT Category CAT Clear Air Turbulence CATS Computer Aided Training System CATIA Computer-Aided Three-dimensional Interactive Applications CAU Circular Area Units CAUT Caution CAWC Central Aural Warning Computer CAWP Caution And Warning Panel CAWS Central Aural Warning System CAY Comparator Lateral Accelerometer CB Circuit Breaker C/B Circuit Breaker CBAL Counterbalance CBIT Continuous Built-In-Test CBM Check Balance Moment CBMS Circuit Breaker Monitoring System CBO Cycles Between Overhaul CBORE Counterbore CBP Compressor Bleed Pressure CBR California Bearing Ratio CBS Circuit Breakers CBS Cutback Stator CBSV Cycles Between Scheduled Visits CBT Computer Based Training CBT Circuit Breaker Panel CC Compass Coupler CC Combustion Case CC Cubic Centimeter CCA Central Control Actuator CCA Circuit Card Assembly CCB Converter Circuit Breaker CCC Crash Crew Cart CCC Compressor Clearance Control CCCV Core Compartment Cooling Valve CCD Comparator Course Data CCD Cursor Control Device CCDL Cross Channel Data Link CCG Customer Configuration Guide CCIO Central Customer Information Organization CCL Cargo Control Logic CCM Cargo Control Module CCQ Crew Cross Qualification CCR Credit Card Reader CCS Cabin Configuration System CCSD Configuration Change Support Data CCTM Cabin Configuration Test Module CCU Cargo Control Unit CCU Cabin Control Unit CCV Customized Chapters Volume CCW Counter Clockwise CCW Curtailment Check Weight CCWS Comparator Control Wheel Steering CD Control Display CD Case Drain CD Cold Drawn CD Count Drag C/D Case Drain CDB Configuration Database CDC Cyclic Redundancy Code CDE Consumption Data Exchange Card CDG Configuration Database Generator CDI Course Deviation Indicator CDL Configuration Deviation List CDL Configuration Data Loader CD MON Course Datum Monitor CDP Compressor Discharge Pressure CDP Control and Dim Panel (EFIS)

CDR Customer Data Requirement CDS Cold Drawn Steel CDS Common Display System CDT Cabin Data Terminal CDU Control Display Unit CDU Center Drive Unit CDU Cockpit Display Unit C/DU Control/Display Unit CDX Control Differential Transformer CDX Controlled Differential Transformer CEB Customer Engineering Bulletin CEC Combi Exhaust Controller CEGT Corrected EGT CEL Celestial CENT Centrifugal CERT Certify CESM Commercial Engine Service Memorandum CEU Converter Electronics Unit CEU Cargo Electronics Unit CEV Clutch Electro Valve CF Course to a Fixed Waypoint CF Control Wheel Force CF Centrifugal Force CF Checking Fixture (tool) CF Cost Factor CFAIL Critical Failure CFD Comparator Flight Director CFD Continuous Fire Detection CFD Comparator Faded Decrab CFDIU Central Fault Display Interface Unit CFDU Continuous Fire Detection Unit CFE Customer Furnished Equipment CFH Cubic Feet per Hour CFM Cubic Feet per Minute CFMI CFM International CFPT Computer Flight Plan Time CFR Code of Federal Regulations CFRP Carbon Fiber Reinforced Plastic CFS Cold Finished Steel CFS Cubic Feet per Second CG Center of Gravity CG Centigram CGF Color Guard Fabric CGG Cool Gas Generator CGM Computer Graphics Metafile CGO Cargo CGS Centimeter-Gram-Second CH Channel CH Chromel CH Center Hatrack CH Charge CH* Comparator Vertical Rate CH-A Channel A CHAM Chamfer CHAN Channel CHAR Character CHAS Chassis CHAV Compressor Heating Air Valve CH-B Channel B CHEM Chemical CHG Charge CHG Change CHGR Charger CHK Check CHK GWT Check Gross Weight CHKPT Checkpoint CHM Chime CHMBR Chamber

8 REV. OCT. 00


CHNG Changer, Changeover CHNGS Changes CHNL Channel CHR Chronograph CHRGR Charger CHRO Chronometer CHRONO Chronometer CI Cast Iron CI Course to an Intercept CI Cost Index CI Cabin Interphone CIC Cabin Interphone Controller CIC Corrosion Inhibiting Compound CIH Cabin Interphone Handset CIM Continuous Image Microfilm CIP Cost Improvement Program CIP Cartridge In Place CIP Cabin Interphone CIR Circular CIRC Circulate CIRC Circumference CIS Cabin Interphone System CIS Cycles In Service CIT Compressor Inlet Temperature CIWS Central Instrument Warning System CK Check CKD Checked CKPT Cockpit CKS Countersink CKT Circuit CKTS Circuits CL Climb CL Center Line CL Close CL Center of Lift CL Clip CL Clutch CL Centiliter C/L Check List C/L Center Line C/L Cumulative Line (position) CLA Condition Lever Angle CLASS Classification CLB Climb CLCP Central Lateral Control Package CLD Closed CLG Ceiling CLG Cooling CLK Clock CLN Colon CLNG Cooling CLNR Cleaner CLOG Clogging CLP Clamp CLPR Clapper CLQ Closed Loop Torque function CLR Clear CLR Clearance (altitude) CLR ALT Clearance Altitude CLRD Cleared CLS Cabin Lighting System CLS Cargo Loading System CLS Continuous Level Sensor CLSD Closed CLSG Closing CLTM Component Location Training Manual CLV Clevis CM Centimeter

CM Crew Member CM Call Maintenance CM Collective Modification CM Condition Monitoring CM Continuous Monitor CMA Comma CMC Central Maintenance Computer CMCF Central Maintenance Computing Function CMCS Central Maintenance Computer System CMD Command CMDD Command Drive (solenoid hold) CMDHS Command Hold Solenoid CMDS Command Switch CMEU Cabin Management Expansion Unit CMFLR Cam Follower CMM Component Maintenance Manual CMM Common Mode Monitor CMO Certification Management Office (FAA) C-MOS Complementary Metal Oxide Semiconductor CMP Customized Maintenance Program CMP Configuration, Maintenance, Procedures (document) CMP Condition-Monitoring Program CMPLRY Complementary CMPNT Compartment CMPNT Component CMPS Compass CMPS Centimeters Per Second CMPS Computerized Maintenance Planning System CMPS CPLR Compass Coupler CMPTG Computing CMPTR Computer CMR Certification Maintenance Requirement CMRB Condition Monitoring Review Board CMRLR Cam Roller CMS Central Maintenance System CMS Cabin Management System CMS Code Material Society CMT Cabin Management Terminal CMU Central Management Unit CN1 Corrected N1 CN2 Corrected N2 CNA Common Nozzle Assembly CNCT Connect CNCTD Connected CNCTN Connection CNCTR Connector CNCTRC Concentric CNCV Concave CND Conduit CNI Communications, Navigation, and Identification CNTL Control CNTNR Container CNTOR Contactor CNTR Counter CNTRL Control CNX Cancelled CO Company CO Cut-Off CO Change Order C/O Change Over CO2 Carbon Dioxide COAX Coaxial COC Customer Originated Change COCC Combustion Chamber Outer Case (JT8D) COD Cash On Delivery COEF Coefficient

9 REV. OCT. 00


COF MKR Coffee Maker COHO Coherent Oscillator COL Column COLL Collision COM Common COM Camout Monitor COM Communication COMB Combined COMD Command COMM Communications COMM Common COMM Commutator COMND Command COMND SP Command Speed COMP Compass COMP Compartment COMP Compressor COMP Computer COMP Compare, Comparator COMP Compensator COMPL Complete, Completed COMPR Compressor COMPT Compartment COMPTR Computer COMSAT Communications Satellite COMPSN Compensation COMPT Compartment COMPTR Comparator COMTN Commutation CON Continuous CON Maximum Continuous Thrust CON Control, Control Panel CON Conversation COND Condition, Conditioning CONDTN Condition CONDTR Conditioner CONF Confidence, Confidential CONFG Configuration CONFIG Configuration CONN Connect, Connection, Connector CONST Constant CONT Contour CONT Continue, Continued, Continuous CONT Control CONT Contactor CONT Controller CONT PNL Control Panel CONTR Controller CONT WHL Control Wheel CONV Converter, Conversion CONVERG Convergence COOL Cooling, Cooler COOL Coolant COORD Coordinate, Coordination COPI Copilot COR Corrector CORCTD Corrected CORR Correct, Correction CORR Corrugate, Corrugation CORR Corrosion CO RTE Company Route COS Cosine COT Cotter COT Cotangent COV Cover COWL Cowling CP Control Panel CP Clock Pulse

CP Comparator CP Center of Pressure CP Candle Power CP Corrosion Prevention CP Core Partition C/P Cleaning/Painting CPBE Crew Protective Breathing Equipment CPC Cabin Pressure Controller CPCP Corrosion Prevention and Control Program CPCPS Corrosion Prevention and Control Programs CPCS Cabin Pressure Control System CPCU Cabin Pressure Control Unit CPF Corrosion Prevention Fluid CPI Crash Position Indicator CPL Couple CPLD Coupled CPLG Coupling CPLR Coupler CPM Corrosion Prevention Manual CPM Cycles Per Minute CPM Core Processing Module CPMU Cabin Passenger Management Unit CPO Crew Performance Objectives CPRSR Compressor CPS Cycles Per Second CPSH Control Panel Solenoid High Side CPT Capture CPTC Corrosion Prevention Task Cards CPU Central Processing Unit CQS Customer Quality Support CR Cruise CR Change Request CR Crew CR Cold Rolled CR Complete Revision CRA Crew Rest Area CRC Continuous Repetitive Chime CRC Cyclic Redundancy Check CRDS Customer Requirements Distribution System CRE Corrosion-Resistant CRES Corrosion Resistant Steel CRF Compressor Rear Frame CRG Carriage CRG Cargo CRG RTN Carriage Return CRI Certification Review Item (JAA) CRIT Critical CRK Crank CRKG Cranking CRL Collar CR MOLY Chrome Molybdenum CRNGRPH Chronograph CRO Comparator Rollout CRPOS Crew Position CRS Course CRS Cold Rolled Steel CRSN Corrosion CRSVR Crossover CRT Cathode Ray Tube CRT Complete Revision Telex CRT Critical CRTL Critical CRU Card Reader Unit CRZ Cruise CS Call Switch CS Centistokes CS Control Switch CS Comparator Servo Monitor

10 REV. OCT. 00


CS Cabin Cleaner Steps CS Control Ship code (Sonic) C/S Center Section CSB Component Service Bulletin CSC Cosecant CSCP Cabin System Control Panel CSD Constant Speed Drive CSE Course Set Error CSE Customer Support Engineering CSEU Control Systems Electronic Unit CSI Cycles Since Installation CSI Computer Software Index CSK Countersink CSKH Countersunk Head CSL Console CSM Cabin System Module CSM Cabin Service Module CSM Command and Service Module CSM Computer Software Manual CSMS Customer Services and Material Support CSMU Cabin System Management Unit CSN Catalog Sequence Number CSQ Quiet Climb System (FMC) CSR Customer Service Representative CSRM Computing Security Requirements Manual CSS Channel Select Switch CSS Cabin Service System CSTG Casting CSTR Constraint CSV Cycles Since Last Shop Visit CSU Central Switching Unit CT Control Transformer CT Current Transformer CT Confidence Test CT Center Tap CT Center Tape CT Cost CT Comparator Throttles C/T Common To CTA Current Transformer Assembly CTA Control Area CTAI Cowl Thermal Anti-Ice CTAS Comparator True Airspeed CTC Cabin Temperature Controller CTD Column Timer Decoder CTD Cross Track Deviation CTF Central Test Facilities CTFOS Customer Training and Flight Operations Support CTG Comparator Takeoff and Go Around CTK Capacity Tonne Kilometre CTL Control CTL Central CTM Cycle Time Monitor CTM/POR Cycle Time Monitor/Power On Reset CTN Caution CTR Center CTR Contour CTR Control Zone CTRD Centered CTRL Control CTS Contrast CTS Clear To Send CTSK Countersunk CTU Cabin Telecommunications Unit CTW Center Wing Tank CTWT Counterweight CU Computer Unit CU Control Unit

CU Cubic Cu Copper CU FT Cubic Foot CU IN Cubic Inch CUM Cumulative CUR Current CUST Customer CV Control Valve CV Check Valve CVR Cockpit Voice Recorder CW Clockwise CW Continuous Wave CW Control Wheel CW Caution and Warning C/W Caution and Warning C&W Caution and Warning CWD Control Wheel Disconnect CWE Control Wheel Engaged CWF Control Wheel Force CWG Cockpit Working Group CWS Control Wheel Steering CWSD Control Wheel Steering Solenoid Drive CWSHS Control Wheel Steering Hold Solenoid CWSS Control Wheel Steering Switch CWT Center Wing Tank CWY Clearway CX Control Transmitter CXN Cancellation CY Calendar Year, Current Year CYL Cylinder

11 REV. OCT. 00


D Derated D Delayed D Diameter DA Drift Angle DA Direct Access DA Double Amplitude D/A Digital-to-Analog DAA Digital Analog Adapter DABS Discrete Address Beacon System DAC D/A Converter DAC Digital Audio Control DAC Double Annular Combustor DADC Digital Air Data Computer DADS Digital Air Data System DAES Digital Audio Entertainment System DANA Dual Autoland Not Available D APSE Delayed Autopilot Servo Engaged DAR Digital Aids Recorder DAR Designated Airworthiness Representative DAS Directional Autopilot Servo DAS/STC Designated Alteration Station/ Supplemental Type Certificate DATR Digital Audio Tape Reproducer DAV Drift Angle Valid DB Decibel DB Data Base DBL Data Base Loader DBLR Doubler DBM Decibels (referenced to a milliwatt) DBT Design Build Team DC Direct Current DC Disposition Code DC Descent DC Diffuser Combustor DCAS Digital Controlled Audio System DCCS DC Current Sensors DCD Double Channel Duplex DCD Decode, Decoder DCDC Delayed Comparator DC DCDR Decoder DCGF Data Conversion Gateway Function DCIR DC Isolation Relay DCMF Data Communication Management Function DCMS Data Communication Management System DCN Drawing Change Notice DCNT Descent DCPC Digital Cabin Pressure Controller DCPCS Digital Cabin Pressure Control System DCPIU Direct Current Power Isolation Unit DCR Drawing Change Request DCS Double Channel Simplex DCS Designated Certification Specialist DCTU DC Tie Control Unit DCU Digital Computer Unit DCU Dimmer Control Unit DCU Data Control Unit DCV Directional Control Valve DCVR Direct Current Voltage Ratio DD Drift Down DD DME-DME D/D Engine Out Drift Down Point DDA Digital Differential Accumulation DDG Dispatch Deviation Guide DDI Design Drawing Instruction DDI Documentary Data Insert DDM Digital Data Module DDM Difference in Depth of Modulation DDPG Dispatch Deviations Procedures Guide

DDRMI Digital Distance and Radio Magnetic Indicator D/DT Differential of D-Mux Demultiplexer DDU Deceleration Detector Unit D/E Decoder/Encoder DEC Decrease DEC Declination DEC Decimal DEC Decrement DECEL Deceleration, Decelerate DECIS Decision DECR Decrease DED Dedicated DED Dead Ended (shield) DEDP Data Entry and Display Panel DEF Definite, Definition DEFDARS Digital Expandable Flight Data Acquisition and Recording System DEFL Deflect, Deflection DEG Degrees DEG Degrade DEL Delete, Deleted DEL Delay Message DEL Diagram Equipment List DEL BY Deleted By DELE Delete DELTA P Differential Pressure DEM Demand DEMOD Demodulator DEMUX Demultiplexer DE-MUX Demultiplexer DEP Departure DEP Data Entry Panel DEP Data Entry Plug DEP Depressurize DEP ARR Departure/Arrival DEP/ARR Departure/Arrival DEPLD Deployed DEPR Depressurize DEPRESS Depressurization DEPT Departure DEPT Department DER Derating DER Designated Engineering Representative (FAA) DER I Derate 1 DER II Derate 2 DES Descent DEST Destination DESTN Destination DET Detent DET Detect, Detector, Detection DET Detached DET Detailed DETN Detection DETNT Detent DEU Display Electronics Unit DEU Densitometer Electronics Unit DEV Deviation DEVN Deviation DEX Access Demanded DF Direction Finder DF Default DFA Delayed Flaps Approach DFCS Digital Flight Control System DFDAC Digital Flight Data Acquisition Card DFDAF Digital Flight Data Acquisition Function DFDAMU Digital Flight Data Acquisition/ Management Unit DFDAU Digital Flight Data Acquisition Unit

12 REV. OCT. 00


DFDR Digital Flight Data Recorder DFFN Dribble Flow Fuel Nozzles DFGC Digital Flight Guidance Computer DFGCP Digital Flight Guidance Control Panel DFR Digital Flight Recorder DFR Defrosting DFRS Digital Flight Recorder System DFT Drift DFT Design Facility Tool DG Directional Gyro DG Dedicated Generator DGAC Direction Generale de L'Aviation Civile DGCU Dedicated Generator Control Unit DGTL Digital DH Decision Height DI Data Input DI De-icing DIA Diameter DIAG Diagonal DIAG Diagram DIAPH Diaphragm DIB Diiodobutane DID Design and Implementation Drawing DIFF Differential, Difference DIG Digital DIGT Digital DIM Dimension DIM Dimming, Dimmer DIP Dual Inline Package DIPLXR Diplexer DIR Direct, Director DIR Direction, Directional DIR INTC Direct Intercept DIR TO Direct To DIS Display DIS Distance DIS Disagreement DIS Discard DISAG Disagree DISC Disconnect, Disconnected DISCH Discharge, Discharged DISCONT Discontinued DISCR Discrete DISCTN Disconnection DISENG Disengage DIS-IN Discrete Inputs DISP Dispatch DISPL Display DISPL Displacement DISRMD Disarmed DIST Distance DISTR Distribution DITS Digital Information Transfer System DIU Digital Interface Unit DIV Division DIV Diversion DJ Drill Jig DK Deck DL Data Link D&L Down and Locked DLA Delay DLC Direct Lift Control DLC ENG Direct Lift Control Engaged DLCNFF Direct Lift Control No First Fail DLCS Direct Lift Control Servo DLCV Direct Lift Control Validity DLD Dynamic Load Damper DLDR Data Loader

DLGF Data Load Gateway Function DLODS Duct Leak and Overheat Detection System DLS Data Load System DLU Data Loader Unit DLW Design Landing Weight DLY Delay DMA Direct Memory Access DMB Dead Main Bus DMC Design Modification Committee DMC Direct Maintenance Costs DME Distance Measuring Equipment DMEP Data Management Entry Panel DMM Data Memory Module DMP Display Management Processor DMPR Damper DMR Dimmer DMS Debris Monitoring System DMU Data Management Unit DN Down DNA Does Not Apply DN/RT Down Right DNTK Downtrack DNTKFX Down Track Fix DO Data Output D&O Description and Operation DOC Direct Operating Cost DOC Document DOC.DATA Documentary Data DOT Differential Oil Temperature DOT Department of Transport DOW Dry Operating Weight DOZ Dozen DP Differential Protection DP Departure DP Differential Pressure DP Display Partition DPCT Differential Protection Current Transformer DPCU Digital Passenger Control Unit DPDT Double Pole Double Throw DPI Differential Pressure Indicator DPI Delta Pressure Indicator DPI Digital Performance Information DPL Detailed Parts List DPR Differential Protection Relay DPR Dual Pressure Rated DPRR Discretionary PRR DPST Double Pole Single Throw DPV Directional Pilot Valve DPV Dual Purpose Valve DR Door DR Dead Reckoning DR Drive DR Drain D/R Dead Reckoning DRAM Dynamic Random Access Memory DRATE Derate DRMI Distance Radio Magnetic Indicator DRS Doors DRT Derate DRVG Driving DRVN Driven DRVR Driver DRWY Doorway DS Destination DS Directionally Solified DS Discard DSA Detailing Sensor Assembly DSAP Disappearance

13 REV. OCT. 00


DSB Double Sideband DSBL Disable DSCD Descend DSCRM Discriminator DSCRT Discrete DSCRT IO Discrete Input/Output DSDU Data Signal Display Unit DSENG Disengage DSENGD Disengaged DSF Display System Function DSMS Design Success Measurement System DSNT Descent DSP Display Select Panel DSP Display DSP Digital Signal Processing DSPL Display DSPLY Display DSR Desired (altitude) DSRTK Desired Track Angle DSS Detailed System Specification DSWC Digital Stall Warning Computer DTB Dead Tie Bus DTD Dated DTD Document Type Definition DTF Design Facility Tool DTG Distance To Go DTK Desired Track (angle) DTM Display Transfer Module D-TO Derated Takeoff Limit DTR Damage Tolerance Rating DTS Dual Temperature Sensor DT SHIP Date Shipped (Sonic) DU Display Unit DUDB Display Unit Database DUM Dummy DUP Duplicate DV VOR/DME DVI Detail Visual Inspection DWG Drawing DWL Diagram Wire List DX Access Demanded DYB Dynamic Braking DYN Dynamic DYNM Dynamotor DYNMTC Dynamometric

E East EA Each EACS Electronic Automatic Chart System EAD Engine and Alert Display EADB Enhanced Area Distribution Box EADI Electronic Attitude Director Indicator EAI Engine Anti-Ice, Engine Anti-Icing EAMR Engineering Advanced Material Release EAROM Electrically Alterable Read Only Memory EAS Equivalent Airspeed EAS Elevator Autopilot Servo EAT Expected Approach Time EAU Engine Accessory Unit EB Electron Beam EBCC ECS Bleed Configuration Card EBG Engine Build Group EBL Engine Buttock Line EBS Engine Bleed System EBS Engine Build Specification EBU Engine Build Up EC Engine Control E/C Economy Class ECAM Electronic Centralized Aircraft Monitoring ECB Electronic Control Box (APU) ECC Equipment Cooling Card ECC Eccentric ECCS Equipment Cooling Control System ECD Electrocardiogram ECD Estimated Completion Date ECM Engine Condition Monitoring ECM Electro-Chemical Machining ECM Electronic Countermeasures ECM Engineering Change Memo ECON Economy ECON Economic ECP ECAM Control Panel ECP Engineering Change Proposal ECR Engineering Change Request ECS Environmental Control System ECS Electronic Cooling System ECS Engine Control System ECSF Engine Control System Fault ECSL Left Environmental Control System card ECSMC Environmental Control Systems Miscellaneous Card ECSR Right Environmental Control System card ECU Electronic Control Unit (APU) ECU Engine Control Unit (G.E. engine) ECV Economy Cooling Valve ED End of Descent ED Edge Distance ED End of Display E/D End of Descent E*D End of Descent EDHP Engine-Driven Hydraulic Pump EDI Engine Data Interface EDIU Engine Data Interface Unit EDM Engine Data Multiplexer EDM Electric Discharge Machine EDM Electro-Discharge Machining EDMC Engineering Drawing Microfilm Card EDP Engine Driven Pump EDP Electronic Data Processing EDP Engine Display Panel EDPE Electronic Data Processing Equipment EDSD Electrostatic Discharge Sensitive Device EDTA Ethylenediamine Tetraacetate E/E Electrical/Electronics

14 REV. OCT. 00


E/E Electronic Equipment E & E Electronic Equipment EEBD Emergency Escape Breathing Device EEC Electronic Engine Control EEC Electronic Engine Controller EEC Electronic Equipment Compartment EECM Electronic Engine Control Monitor EECS Electronic Engine Control System EEPROM Electrically Erasable Programmable Read-Only Memory EEROM Electrical Erasable Read Only Memory EF Existing Faults (CMC) EFAS Enroute Flight Advisory System EFC Elevator Feel Computer EFC Expected Further Clearance (time) EFCC Electronic Flight Control Computer EFCS Electronic Flight Control System EFCU Electronic Flight Control Unit EFCU Elevator Feel and Centering Unit EFDARS Expandable Flight Data Acquisition and Recording System EFDS Engine Fault Display System EFDU Engine Fault Display Unit EFF Effective, Effectivity EFF Efficiency EFI Electronic Flight Instrument EFIS Electronic Flight Instrument System EFIS CP EFIS Control Panel EFISSG EFIS Symbol Generator EFIS SGU EFIS Symbol Generator Unit EFSG EFIS Symbol Generator EG For Example EGA Extra Ground Attenuation EGT Exhaust Gas Temperature EGT Engine Gas Temperature EHF Extremely High Frequency EHM Engine Health Monitoring EHS Extra High Shear EHSI Electronic Horizontal Situation Indicator EHSV Electro-Hydraulic Servo Valve EHV Electro-Hydraulic Valve EICAS Engine Indication & Crew Alerting System EICAS/CP EICAS Control Panel EIS Electronic Instrument System EIS Engine Instrument System EIS Engine Indicating System EISCP Electronic Instrument Control Panel EIU Engine Interface Unit EIU EFIS/EICAS Interface Unit EL Elevation EL Equipment List EL Electroluminescent ELAPS Elapsed Time ELC Engine Limiter Control ELCCR Electrical Liaison Commitment Center Record ELCU Electrical Load Control Unit ELEC Electric, Electrical, Electricity ELEC Electronic ELECT Electric ELECT Electronic ELEK Electronic ELEKS Electronics ELEV Elevation ELEV Elevator ELEX Electronic ELFA Elevator Load Feel Actuator ELI Equipment List ELIM Eliminate

ELMS Electrical Load Management System ELR Engineering Liaison Request ELS Electronic Library System ELT Emergency Locator Transmitter ELV Elevation ELV Elevator EMC Entertainment Multiplexer Controller EMC Executive Maintenance and Materiel Council EMDP Electric Motor Driven Pump EMER Emergency EMERG Emergency EMF Electromotive Force EMHP Electric Motor-Driven Hydraulic Pump EMI Electro-Magnetic Interference EMMU Engine Monitoring Multiplex Unit EMP Electric Motor Pump EMP Empennage EMP Electromagnetic Pulse EMP Engine Management Program EMR Electromagnetic Riveting EMS Electronic Mail System EMU Engine Maintenance Unit EMU Event Monitoring Unit EMU Engine Module Unit EN Enable ENBL Enable ENCD Encode ENCDR Encoder ENCL Enclosure END Endurance ENDUR Endurance ENG Engine ENG Engage ENGA Engage ENGD Engaged ENG EXCD Engine Exceedance ENG LIM Engine Limit ENG OUT Engine Out ENGR Engineer ENGRG Engineering ENGS Engines ENG VIB Engine Vibration ENP Estimated Normal Payload ENRGZ Energize ENT Entertainment ENT Entry, Entrance ENTMT Entertainment ENTR Entrance ENT T/R Entertainment Tape Reproducer ENV Envelope ENWY Entryway EO Engine Out EO Engineering Order E/O Engine Out EOAP Electronic Overhead Annunciator Panel EOEW Equivalent Operating Empty Weight EOI Engineering Operating Instruction EOP End Of Part EOSID Engine Out Standard Instrument Departure EOT End Of Tape EP Entry Panel EP External Power EPA Emergency Power Assist EPA Environmental Protection Agency EPC External Power Contactor EPC Electrical Power Center EPCU Electrical Power Control Unit EPCR External Power Control Relay

15 REV. OCT. 00


EPCS Electronic Propulsion Control System EPESC Enhanced Passenger Entertainment System Controller EPFP External Power Fault Protection EPGS Electrical Power Generating System EPP EEC Programming Plug EPR Engine Pressure Ratio EPR Exhaust Pressure Ratio EPR Ethylene Propylene Rubber EPR.D EPR Descent EPRL Engine Pressure Ratio Limit EPR.L EPR Latch EPROM Electrically Programmable Read Only Memory EPROM Erasable Programmable Read Only Memory EPU Emergency Power Unit EQ Equipment EQA Equipment Quality Analysis EQA Engineering Quality Analysis EQL Equalizer EQPMT Equipment EQPT Equipment EQUAL Equalization Signal EQUIP Equipment EQUIV Equivalent ER Extended Range ER Elevator Rib ER Enroute Cruise ERD Excessive Rate Detector ERECT Erection ERF Exceedance RAM Full ERI Extended Repeat Interval EROPS Extended Range Operations ERP Eye Reference Point ERP Effective Radiated Power ERR Error ERS Erase, Erased ERU Engine Relay Unit ES Engine Start ESC Entertainment/Service Controller ESC Entertainment System Controller ESC Escape ESC Engine Supervisory Controller ESC Environmental System Controller ESCC Electrical Supply and Control Center ESCV Eleventh Stage Cooling Valve ESD Electrostatic Discharge ESD Electronic System Display ESDS Electrostatic Discharge Sensitive ESFC Equivalent Specific Fuel Consumption ESHP Equivalent Shaft Horsepower ESI Engine Start Inhibit ESNTL Essential ESNP Engine Serial Number Plug ESP Emergency Spill Valve ESS Essential ESS Engine Start System EST Estimated ESTA Engine Station ESTS Electronic System Test Set ESU Electronic Sequence Unit ESU Electronic Switching Unit ET Elapsed Time ET Extended Trailing Edge E/T Electrical Trim ETA Estimated Time of Arrival ETC Electronic Turbine Control ETC Essential Tie Contactor ETC Electrical Temperature Control

ETC Electronic Temperature Control ETD Estimated Time of Departure ETE Estimated Time Enroute ETI Elapse Time Indicator ETM Elapsed Time Meter ETO Estimated Time Over ETOPS Extended (range) Twin-engine Operations ETP Equal Time Point ETPU Engine Transient Pressure Unit ETPU Electrical Transient Pressure Unit ETS Equipment Technical Specification EU Excessive Update EV Electro Valve EV East Velocity EV Excessive Velocity EVAC Evacuation EVAL Evaluation EVAP Evaporate, Evaporator EVBC Engine Vane Bleed Control EVM Engine Vibration Monitor EVSC Engine Vibration Signal Conditioner EVSCU Enhanced Video System Control Unit EVT Event EWA Engineering Work Authorization EWL Engine Waterline EWS Electronic Warning System EX Exhaust EX Excitation EX Example EXC Excite, Excitation EXCD Exceedance, Exceedances EXCD Excited EXCESS Excessive EXCG Exciting EXCH Exchange EXCIT Excitation EXCN Excitation EXCT Excitation EXCTR Exciter EXEC Execute EXH Exhaust EXP Expand, Expanded, Expansion Expl. Explosive EXT External EXT Extend, Extended, Extension EXT Exterior, External EXTC Extract EXTCD Extracted EXTCG Extracting EXTEN Extension EXTG Extending EXTIG Extinguishing EXTIN Extinguish, Extinguished, Extinction EXTING Extinguishing, Extinguish EXTIR Extinguisher EXTN Extension EXTR Extrude, Extrusion EXTRACT Extraction EZ Electrical Zero

16 REV. OCT. 00


F Fahrenheit (degrees) F Force F Minimum Flap Retract Speed (EFIS) F Flare F Fire F Fuel F Farad f Function (of) FA Final Approach F/A Flight Attendant F/A Final Assembly FA Family (WDM) FAA Federal Aviation Administration FAB Fabricate, Fabrication FAC Flight Augmentation Computer FACIL Facility FACS Flight Augmentation Computer System FADEC Full Authority Digital Electronic Control FAEEC Full Authority Electronic Engine Control FAF Final Approach Fix FAFC Full Authority Fuel Control FAIL Failed, Failure FAIR Fairing FAMV Fan Air Modulating Valve FAOM Flight Attendant Operating Manual FAR Federal Airworthiness Regulation FAR Federal Aviation Regulations FAS Flight Augmentation System FASTNR Fastener FAT Free Air Temperature FATM Flight Attendant Training Manual FATS Fan Air Temperature Sensor FAV Fan Air Valve FAWP Final Approach Waypoint F/B Form Board FBH Forward Bearing Housing FBM Feet Board Measure FBS Fixed Base Simulator FBW Fly By Wire FC First Class FC Freight Container FC Fully Closed FC Footcandle FC Functional Check FC Course from a Fixed waypoint to a Changeover point F/C First Class F/C Fully Closed F/C Functional Check FCA Fuel Condition Actuator FCC Flight Control Computer FCCS Flight Control Computer System FCCU Flight Control Computer Unit FCD55 Full Color Display 5x5 FCDC Flight Control Direct Current FCDC Flight Critical DC FCE Flight Control Electronics FCEPS Flight Control Electronic Power Supply FCES Flight Control Electronic System FCES PM FCES Power Monitor FCEU Flight Control Electronics Unit FCM Fuel Conservation Manual FCOC Fuel Cooled Oil Cooler FCOM Flight Crew Operating Manual FCPI Flight Control Position Indicator FCS Flight Control System FCS Flight Control Surface FCSOV Flight Control Shut-Off Valve

FCST Forecast FCT Functional F/CTL Flight Control FCTM Flight Crew Training Manual FCTN Function FCU Flight Control Unit FCU Fuel Control Unit FCU Flap Control Unit FCV Flow Control Valve FD Flight Director FD Fuselage Datum FD Course from a Fixed waypoint to DME Distance FD Flaps Down F/D Flight Director F/D Fan Discharge F/D Frequency to Digital FDAF Flight Data Acquisition Function FDAP Flight Deck Audio Panel FDAU Flight Data Acquisition Unit FDBK Feedback FD CMD Flight Director Command FDD Floppy Disk Drive FDDI Fiber Distributed Data Interface FDDVA Flow Divider and Drain Valve Assembly FDE Flight Deck Effect FDE Flight Director Engaged FDEP Flight Data Entry Panel FDH Flight Deck Handset FDM Fault Data Management FDMU Flow Divider Metering Valve FDPS Flight Director Pitch Sync FDR Flight Data Recorder FDR Feeder FDRS Flight Data Recorder System FDS Flight Director System FDS Flight Director Selected FDSU Flight Data Storage Unit F/E Flight Engineer FED Federal FED-STD Federal Standards FESC Forward Electronic Service Center FET Field Effect Transistor FEW Fleet Empty Weight FEXT Fire Extinguisher FF Fuel Flow FF Feeder Fault FF Fast Forward FF Final Fix F/F Fuel Flow F/F Flip Flop F-F Fuel Flow FFCC Forward Facing Crew Cockpit Concept FFCC Forward Facing Crew Cockpit Configuration FFCCV Flight Guidance Control Panel FFCCV Fan Frame Compressor Case Vertical FFEU Fuel Flow Electronics Unit FFG Fuel Flow Governor FFL Flip Flop Latch FFP Fixed Firm Price FFR Fuel Flow Regulator FFRATS Full Flight Regime Autothrottle System FFS Fuel Flow System FFS Full Flight Simulator FFWD Fast Forward FGI Flight-Ground Idle FGN Foreign FGS Flight Guidance System FH-All Fault History - All (CMC)

17 REV. OCT. 00


FHP Friction Horsepower FI Fault Isolation FI Flight Idle FIAU Flight Instrument Accessory Unit FIDDS Fault Isolation Data Display System FIDO Flight Information and Data Output (FMC) FIDS Fault Isolation and Detection System FIFO First Input/First Output FIG Figure FIL Filament FIL Fillet FIL H Fillister Head FILT Filter FIM Fault Isolation Manual FIM Fault Indication Module FIM Fault Isolation Monitor FIM Full Indicator Movement FIN Functional Item Number FIN Vertical Stabilizer FIN STA FIN (vertical stabilizer) Station FIN WL FIN (vertical stabilizer) Waterline FIP Flight Interphone FIR Full Indicator Reading FIR Flight Information Region FIREX Fire Extinguisher FIRM Fault Isolation Reporting Method FIS Flight Information Service FIS Flight Instrument System FISR Fleet Issues Summary Report FJCC Fuel Jettison Control Card FK Fork FL Flight Level FL Flow FL Flood FL Floor FL Fluid FL Flap FL Flight FL Focal Length FLACW Fault Action Word Fla.G Flammable Compressed Gas Fla.L Flammable Liquid Fla.S Flammable Solid FLC Feel and Limitation Computer FLCH Flight Level Change FL CH Flight Level Change FL CHG Flight Level Change FLD Field FLDK Flight Deck FLDT Floodlight FLEX Flexible FLG Flange FLH Flat Head FLLT Flashing Light FLMPRF Flameproof FLMTR Flowmeter FLNG Fueling FLOE Flight Operations Engineering FLOT Flotation FLP Flap FLR Flare FLRS Flap Load Relief System FL SB Flap Switch Box FLT Flight FLT ATTD Flight Attendant FLT CONT Flight Control FLT DIR Flight Director FLT DK Flight Deck

FLT/DK Flight Deck FLT INT Flight Interphone FLT LDR Fleet Leader FLTP Flight Path FLT PLN Flight Plan FLTR Filter FLT RCDR Flight Recorder FLT REC Flight Recorder FLUOR Fluorescent FLWG Following FLX Flexible FLXTO Flexible Take-Off FM Frequency Modulation FM Fan Marker FM Course from a Fixed waypoint with a Manual termination FM Function Module FMA Flight Mode Annunciator FMC Flight Management Computer FMCF Flight Management Computing Function FMCS Flight Management Computer System FMC SPD FMC controlled Speed FMCU Flight Management Computer Unit FME Floor Mounted Equipment (tool) FMEA Failure Mock Effect Analysis FMEA Failure Mode and Effect Analysis FMPI Fluorescent Magnetic Particle Inspection FMS Flight Management System FMSM Fuel Measuring Stick Manual FMU Fuel Metering Unit FMV Fuel Metering Valve F/N Flag Note FNA Final Approach FNCP Flight Navigation Control Panel FNP Fusion Point FNSG Flight Navigation Symbol Generator FO Fully Open FO First Officer F/O First Officer FOB Fuel On Board FOB Free On Board F/OBS First Observer FOC Fuel Oil Cooler, Fuel Oil Cooling FOC Free Of Charge FOD Foreign Object Damage FOD Fuel Over Destination FOEB Flight Operations Evaluation Board FOPB Flight Operations Policy Board FOR Flight Operations Review FOR DET For Detail FP Fuel Pressure FP Freezing Point FPA Flight Path Angle FPAC Flight Path Acceleration FPD Facility Planning Document FPD Freezing Point Depressant FPI Fluorescent Penetrant Inspection F-PLN Flight Plan F/PLN Flight Plan FPM Feet Per Minute FPP Forward Power Present FPS Feet Per Second FPT Flight Path Target FPV Flight Path Vector FQ Fuel Quantity FQDU Fuel Quantity Display Unit FQI Fuel Quantity Indicator FQI Fuel Quantity Indication

18 REV. OCT. 00


FQIS Fuel Quantity Indicating System FQPU Fuel Quantity Processor Unit FQS Fuel Quantity System FR Field Relay FR Front FR From FR Frame FRAG Fragment FRAT Full Rate Auto Trim FRCM Flight Recorder Control Module FRCP Flight Recorder Control Panel FREQ Frequency FRES Fire Resistant FRICT Friction FRM Fault Reporting Manual FRM From FRO Future Replacement Order FRP Fiberglass Reinforced Plastics FRQ Frequency FRT Front FS Front Spar FS Fast Slew FS Fuselage Station FS Flap Switch FS Fuel Savings FS Federal Specification FS Flight Simulator Fs Control Force F/S Fast/Slow F/S Front Spar F/S Full Size FSASR Field Service Airline Status Report FSB Fasten Seat Belt FSC Federal Supplier Code FSC Fuel System Controller FSCM Federal Supply Code for Manufacturers FS D Fast Slew, Date (clock) FSDO Flight Standards District Office FSE Field Service Engineering FSEIC Fuel System EICAS Interface Card FSEU Flap/Slat Electronic Unit FSLG Fuselage FSMC Fuel System Management Card FSN Federal Stock Number FSO Flight Standards Office (FAA) FSOV Fuel Shutoff Valve FSPM Flap/Stabilizer Position Module FSR Field Service Report FSS Front Spar Station FSS Flight Service Station FSSI Front Spar Station Inboard FSSO Front Spar Station Outboard FS STA Front Spar Station FSTN Fasten FSTNR Fastener FSU Fuel Summation Unit FSV Full Scale Value F SYNC Fast Synchronization FT Feet, Foot FT Fuel Temperature FT Functional Test FT Flight Test F/T Functional Test FTC Flare Test Complete FTG Fitting FTK Freight Tonne Kilometre FTK Fuel Tank FTL Footlambert

FT-LB Foot-Pound FT/MN Feet per Minute FTMS Federal Test Method Standard FTR Fuel To Remain FTRNG Feathering FTRP Fleet Team Resolution Process FTS Frame Time Select FT/SEC Feet per Second FU Fuse FU Fuel Used FU Feedback Unit FU Flaps Up F/U Follow-Up FUNC Functional FUNCT Functional FUS Fuselage FUSLG Fuselage FV Flux Valve FW Firewall FW Failure Warning F/W Firewall F/W Failure Warning FWC Flight Warning Computer FWC Factory Work Code FWD Forward FWL Fin (vertical stabilizer) Waterline FWS Flight Warning System FWSD Flight Warning and System Display FWSOV Firewall Shutoff Valve FWT Folding Wing Tip FWTEC Folding Wing Tip Electronic Card FXD Fixed FY Fiscal Year FYI For Your Information

19 REV. OCT. 00


G Gravity G Gravitational Unit G Gram G Green G Gyro G Grid G Generator GA Go-Around GA General Application GA Gauge G/A Go Around G/A Ground-to-Air GAC Ground Air Connection GAE Go Around Engaged GAIR General Assembly Inspection Report GAL Gallon, Gallons GAL/HR Gallons per Hour GAL/SEC Gallons per Second GALV Galvanize GALV Galvanometer GALY Galley GAMMA-A Slope GAMMA-T Potential Slope GAS Go Around Selected GB Generator Breaker GBS Generator Breakers GBST Ground Based Software Tool GCA Ground-Controlled Approach G-CAL Gram-Calorie GCB Generator Circuit Breaker GCM Ground Checkout Module GCP Glareshield Control Panel GCR Generator Control Relay GCR Generator Control Regulator GCR Group Coded Recording GCS Ground Clutter Suppression GCU Generator Control Unit GD Gear Down GDL Ground List GDNC Guidance GE General Electric GEN Generator GEN General GENL General GES Ground Earth Station GF Generator Field GFE Government Furnished Equipment GFR Generator Field Relay GFTM General Familiarization Training Manual GG Graphics Generator G/G Ground Guidance GHD Ground Handling Document GHE Ground Handling Equipment GHR Ground Handling Relay GI Ground Idle GIM General Introduction Manual GLC Generator Line Contactor GLR Galley Load Relay GLR Generator Line Relay GLY Galley GM Gram GMC General Modifications Committee GMR Ground Movement Radar GMT Greenwich Mean Time GND Ground GNDA Ground Acceleration GND RET Ground Return GNDV Ground Speed

GO ARND Go-Around GOV Governor GOVT Government GOX Gaseous Oxygen GP Gain Program GP Group GP Glide Path GP General Purpose G/P Glidepath GPCP Ground Proximity Control Panel GPCT Ground Power Current Transformer GPCU Ground Power Control Unit GPH Gallons Per Hour GPM Gallons Per Minute GPROX Ground Proximity GPS Global Positioning System GPS Gallons Per Second GPSSU Global Positioning System Sensing Unit GPU Ground Power Unit GPWC Ground Proximity Warning Computer GPWM Ground Proximity Warning Module GPWS Ground Proximity Warning System GR Gear GR Graphic Recorder GRA Gray GRA Geared Rotary Actuator GRAD Gradation GRC Ground Radio Communication GRD Ground GRD PWR Ground Power GRN Green GRO Ground Roll Out GRP Group GRP Geographic Reference Point GRP Ground Reference Point GRP Glass-Reinforced Plastic GRS Gust Response Suppression GRV Groove GRVTY Gravity GS Glide Slope GS Ground Speed G/S Glide Slope G/S Ground Speed GSB Ground Service Bus GSC Glide Slope Capture GS CAP Glide Slope Capture GSE Ground Support Equipment G/SF Glide Slope Flag GSGP Glide Slope Gain Program GSI Glideslope Intercept GSKT Gasket GSM General Structure Manual GSPD Groundspeed GSPR Gasper GSR Ground Service Relay GSRV Glide Slope Receiver Validity GSSR Ground Service Select Relay GST Glide Slope Track GST Gimbal Slew Test GSTR Ground Service Transfer Relay GS TRK Glide Slope Track GTA General Terms Agreement GTHRG Gathering GTV Gate Valve GU Gear Up GUID Guidance GVL Gravel GW Gross Weight

20 REV. OCT. 00


GWT Gross Weight G-x Galley-x GY Gray GYRO Gyroscope

H Hot H Hour H High, Height H Hot (electrical point) H Hydrogen H Headwind H2O Water HA Holding Pattern to an Altitude Termination HA Hectare HA Hose Assembly HAA Height Above Airport HAS Heading and Attitude System HAT Height Above Touchdown HB Brinnell Hardness Test Value HBAW Handbook Bulletin for Airworthiness (FAA) HBM Heart Beat Monitor HBOV Handling Bleed Off Valve HC Hose Component HCAU Heading Coupler Accessary Unit HCC High Pressure Case Cooling HCS Hydromechanical Control System HD Head HDG Heading HDG HOLD Heading Hold HDGR Heading Rate HDG HLD Heading Hold HDG/S Heading Select, Heading Selected HDG SEL Heading Select HDG/STS Heading Status HDL Handle HDLG Handling HDS Horizontal Drive Shaft HDST Headset HEPA High Efficiency Particulate Air HEX Hexadecimal HEX Hexagon HF High Frequency HF Holding Pattern to a Fixed waypoint HF High Friction HFEC High Frequency Eddy Current Hg Mercury HGR Hangar HGT Height HGW High Gross Weight HHE Heading Hold Engaged HI High HIAD Handbook of Instruction for Aircraft Designers HIL Hold Item List HILDA High Lift Data Analyzer HILDA High Lift Databus Analyzer HIRF High Intensity Radiated Fields HIRL High Intensity Runway Lights HIV Hydraulic Isolation Valve HI Z High Impedance HK Knoop Hardness Test Value HL High Level H/L Hold Item List H/L High Low HLAC High Level AC Voltage HLCL Helical HLCS High Lift Control System HLD Hold HLDC High Level DC Voltage HLDG Holding HLDR Holder HLTY Healthy HM Holding pattern with a Manual termination HMG Hydraulic Motor Generator

21 REV. OCT. 00


HMU Hydro-Mechanical Unit H NAV Horizontal Navigation HNBK Handbook HND Hand HNDBK Handbook HNG Hinge H/O Hard-Over HOC High Oil Consumption HOLD Holding HOLD Y Hold-Year HOQ Hydraulic Oil Quantity HOR Horizontal HORIZ Horizon HORIZ Horizontal HORZ Horizon HOT High Oil Temperature HP High Pressure HP Horsepower HP High Pass HPA Hectopascals (Millibars) HPA High Power Amplifier HPC High Pressure Compressor HPE High Pressure Hook Engage HP FCOC High Pressure Fuel Cooled Oil Cooler HPFAC High Pressure and Fan Air Controller HPHF High Pressure Hook Fault HP HR Horsepower-Hour HP-HR Horsepower-Hour HPI Hydraulic Pressure Indicator HPM High Pressure Hook Monitor HPMV High Pressure Hook Monitor Valid HPNGV High Pressure Nozzle Guide Vane HPR High Pressure Rotor HPSOV High Pressure Shut Off Valve HPT High-Pressure Turbine HPTACC High Pressure Turbine Active Clearance Control HPTC High Pressure Turbine Cooling HPWS High Pressure Water Separator HQI Hydraulic Quantity Indicator HQIU Hydraulic Quantity indication Unit HQTRS Headquarters HR Radio Height (altitude) HR Hour HR Hot Rolled HR Human Resources HR(x) Rockwell Hardness Test Value HR(xxx) Rockwell Superficial Hardness Test Value HRD Hard HRD Hardware Requirements Document HRS Hours HS High Speed HS Horizontal Stabilizer HS High Stage H/S Horizontal Stabilizer HSBL Horizontal Stabilizer Buttock Line HSC Hydraulic Service Center HSC Hydraulic System Controller HSCT High Speed Civil Transport HSD Hours Slew-Day HSE Heading Select Engaged HSG Housing HSI Horizontal Situation Indicator HSI Hot Section Inspection HSPRSOV High Stage Pressure Regulating and Shutoff Valve HSRP Horizontal Stabilizer Reference Plane HSS High Speed Steel HST Horizontal Stabilizer Tank

HSV High Stage Valve HT Heat HT Heat-Treat HT Height HT Hard Time H/T Heat-Treat HTAS High True Airspeed HTD Heated HTG Heating HTR Heater HTSA Height Switch A (1500 ft) HTSB Height Switch B (Flare) HT TR Heat Treat HUD Heads Up Display HUL Hook-Up List H/U Hook-Up HV High Voltage HV Vickers Hardness Test Value HVDF High and Very High Frequency Direction Finding Stations HVPS High Voltage Power Supply HVY Heavy HWBPT Hardware Breakpoint H/WIND Head Wind HX Heat Exchanger HYD Hydraulic HYDIM Hydraulic Interface Module HYDQUIM Hydraulic Digital Quantity Interface Module HYDR Hydraulic HYQUIM Hydraulic Quantity Indicating Module Hz Hertz

22 REV. OCT. 00


I Index I Inertial I Implementation Age (MPD) IACS International Annealed Copper Standard IAF Initial Approach Fix IAS Indicated Air Speed IASE Indicated Air Speed Engaged IASS Indicated Air Speed Selected IAT Inhibit Auto Trim IATA International Air Transport Association IATP International Airline Technical Pool IAW In Accordance With IAWLU Inertial Aural Warning Logic Unit IAWP Initial Approach Waypoint IB Inboard IBIT Initiated Built-In-Test IBN Identification Beacon IBVSU Instrument Bus Voltage Sense Unit IC Integrated Circuit IC Interchangeability Code IC Initial Climb IC Invoice Control Card I/C Inspection/Check I/C Intercom I/C Interphone Communication ICAO International Civil Aviation Organization ICD Interface Control Document ICM Instrument Comparison Monitor ICPI Integrated Cabin Pressure Indicator IC-RT Intercom-Radio Transmitter ICS Intercommunications System ICU Instrument Comparator Unit ICU Interface Control Unit ICY Interchangeability ID Identification, Identifier ID Inside Diameter IDD Inertial/DME-DME IDENT Identify, Identification IDENT Identifier IDG Integrated Drive Generator IDGS Integrated Drive Generator System IDP Integrated Data Processing ID PL Identification Plate IDS Integrated Display System IDU Integrated Display Unit IDU Interactive Display Unit IDV Inertial/VOR-DME IE In Effect (that is) IEC Integrated Electronic Control IEPR Integrated Engine Pressure Ratio IF Intermediate Frequency IF Initial Fix IF In Flight I/F Interface Fault IFE In-Flight Entertainment IFF Identification Friend or Foe IFR Instrument Flight Rules IFSAU Integrated Flight System Accessory Unit IFSD In Flight Shut Down IFSS Inboard Front Spar Station IGB Inlet Gearbox IGN Ignition IGS Integrated Graphic System IGV Inlet Guide Vane IGVA Inlet Guide Vane Actuator IHC Integrated Handset Controller IHCB Industrial Hazards Control Bulletin IHP Indicated Horsepower

IHPH Indicated Horsepower Hour IHP-HR Indicated Horsepower Hour IHS Industrial Hygiene and Safety Standards IIPD Illustrated Initial Provisioning Document ILCB Indicator Light Control Box ILES Inboard Leading Edge Station ILL Illuminate, Illumination ILLUM Illuminate, Illumination, Illuminated ILLUMD Illuminated ILLUS Illustrate, Illustrator, Illustration ILM Independent Landing Monitor ILS Instrument Landing System ILSCP ILS Control Panel IM Inner Marker (ILS) IMBAL Imbalance IMC Instrument Meteorological Conditions IML Inside Mold Line IMM Immediate IMMTE Integrated Mix Manifold Temperature Error IMP Impeller IMP Imperial IMP Impact IMP Impulse IMPATT Impact Avalanche and Transmit Time (diode) IMU Inertial Measurement IN Inch, Inches IN Inlet IN Inspection IN Input INA Initial Approach INB Inbound INBD Inboard INC Increase INC Incorporated, Incorporation INC Increment INCL Including, Inclusive INCLG Including INCLR Intercooler INCPT Intercept INCR Increase INCR Increment IND Indicator IND Indicate, Indicated INDEF Indefinite INDEP Independent INDG Indicating INDUC Inductance INDUS Industrial INDX Index INFC Interface INFIS Inertial Navigation Flight Inspection System INFLT Inflight INFO Information INH Inhibit INHB Inhibit INHG Inches of Mercury IN HG Inches of Mercury INHI Inhibit INHIB Inhibit, Inhibition INIT Initialize, Initiate INIT Initial, Initialization INIT REF Initialization Reference INL Inlet IN-LBS Inch-Pounds INOP Inoperative INP Input INPH Interphone INR Inner

23 REV. OCT. 00


INRTL Inertial INS Inertial Navigation System INS Insulate INS Insurance (Sonic) INSB INS Bus INSP Inspect, Inspection INSR Insert INST Instrument, Instruments INST Instrumentation INSTL Install, Installation INSTLLD Installed INSTM Instrumentation INSTR Instrument INSTS Instruments INST XFR Instrument Transfer INSUL Insulate, Insulation, Insulator INT Interphone INT Interior INT Internal INT Integral, Integrating INT Intersection INT Interrupt INT Intermittent INT Intake INTC Interconnect INTC Intercom INTC Intercept INTCHG Interchangeable INTCM Intercom INTCON Interconnection INTCP Intercept INTEG Integrator, Integration INTEN Intensity INTER Interrupt INTERR Interrogation INTFC Interface INTG Integral INTGT Integrate INTK Intake INTL Internal INTL Initialize INTLK Interlock INTLKS Interlocks INTMD Intermediate INTMT Intermittent INTPH Interphone INTR Interior INTRG Interrogate, Interrogator INTRO Introduction INTRP Interrupt INTRPT Interrupt INTS Integrator Saturated INU Inertial Navigation Unit INV Inverter INV Invalid INWP Intermediate Waypoint I/O Input/Output I-OEU Inboard Overhead Electronics Unit IOM Inertial/Omega Mix IOM Input/Output Module IOP Input/Output Processor IOR Immediate Operational Requirement IP Intermediate Pressure IP Invoice Packing Card IP Impact Pressure I/P Intercept Point I/P Intercept Profile I/P Input

IPC Illustrated Parts Catalogue IPCT Initial Provisioning Coordination Team IPD Initial Provisioning Document IPL Illustrated Parts List IPS Inches Per Second IPV Indicator Para Visual IQI Image Quality Indicator IR Infrared IRD Interior Reconfiguration Document IRMP Inertial Reference Mode Panel IRMS Integrated Radio Management System IRNG In Range IRP Integrated Refueling Panel IRQ Interrupt Request IRREG Irregular Irr.M Irritating Material IRS Inertial Reference System IRU Inertial Reference Unit ISA International Standard Atmosphere ISA ICAO Standard Atmosphere ISA In Service Activities ISAR In Service Activities Report ISB Inter System Bus ISC Instrument Systems Corporation ISC Industry Steering Committee ISC Industry Subcommittee ISDAS In-Service Data Acquisition System ISDU Inertial System Display Unit ISDU Inertial Sensor Display Unit ISG Instrument Symbol Generator Unit ISLN Isolation ISO Isolation ISO International Standards Organization ISO In-Service Occurrence Reports ISOL Isolate, Isolated, Isolation ISPA Inertial Smooth Pressure Altitude ISS Inboard Slat Station ISS Inertial Sensor System ISS Inertial Sensing System ISS Issue ISSS Instrument Source Select Switch ISU Inertial Sensor Unit IT Interruption ITEL Illustrated Tool and Equipment List ITEM Illustrated Tool and Equipment Manual ITT Interturbine Temperature IU Inertial Unit IV Isolation Valve IVASEB Integrated Video Audio Seat Electronics Box IVS Inertial Vertical Speed IVS In-arm Video System IVSI Instantaneous Vertical Speed Indicator IVV Instantaneous Vertical Velocity I/W In Work I/W Interchangeable With (IPC)

24 REV. OCT. 00


J Joule JAA Joint Airworthiness Authorities JAM Jammed, Jamming JAMG Jamming JAN Joint Air Force-Navy JAR Joint Airworthiness Requirements JAR Joint Airworthiness Regulatory JB Junction Box J-BOX Junction Box JCT Junction JETT Jettison JFC Jet Fuel Control JIT Just In Time JK Jack JNL Journal JO Job Order JOG Joggle JPR Jumper JREMS Justified Removals JS Jump Seat JT Joint JTSN Jettison

K Knot K Kilo K Thousand K 1024 K Kelvin (degrees) KAP Keep-Alive-Power KBAR Kilobar KC Kilocycle KCAL Kilocalorie KCAS Knots of Computed Airspeed KBD Keyboard KEAS Knots Equivalent Airspeed KEV Kiloelectrovolt Kg Kilogram KG Kilogram KG-CAL Kilogram-Calorie KGH Kilograms per Hour KG-M Kilogram-Meter KGPH Kilograms Per Hour KGS Kilograms KG-SEC Kilometers per Second KHz Kilohertz KIAS Knots Indicated Air Speed KIP Kilopounds KIP-FT Kilo Foot-pounds KL Kiloliter KM Kilometer KM/SEC Kilometers per Second KN Knot KOHM Kilo Ohm K PA Kilopascal KRUG Kruger KSI Kilopounds per Square Inch KT Knot KT Kiloton KTS Knots KV Kilo Volt KVA Kilovolt-Amperes KVAR Kilovolt-Amperes Reactive, Kilovar KW Kilowatt KWH Kilowatthour KWHR Kilowatthour KWR Kilowatts Reactive KWS Kilowatts

25 REV. OCT. 00


L Left L Length L Liter L Inductor L Low L Lambert L Lumen LA Linear Accelerometer LA Longitudinal Accelerometer unit LA Lightning Arrestor LAB Laboratory LAC Local Area Controller LAG Lagging LAM Lateral Autopilot Module LAM Laminate LAN Local Area Network LAS Lateral Autopilot Servo LAT Latitude LAT Lateral LATA Lateral Acceleration LAT/ACC Lateral Accelerometer LAT DEV Lateral Deviation LATL Lateral LAT REV Lateral Revise LAU Linear Accelerometer Unit LAV Lavatory LB Pound LB Left Body L-BAND .6 to 1.55 GigaHz frequency band LBBL Left Body Buttock Line LB-FT Pound-Foot (Torque) LB-IN Pound-Inch LBL Left Buttock Line LBLR Label Recognition LBP Left Bottom Plug LBS Lateral Beam Sensor LBS Pounds LBS/HR Pounds Per Hour LBTR Left Bus Tie Relay LC Load Controller LC Labor Cost LC Lower Center LCA Lateral Control Actuator LCC Life Cycle Cost LCC Low pressure Case Cooling LCCA Lateral Central Control Actuator LCD Liquid Crystal Display LCDU Left Control Display Unit LCF Low Cycle Fatigue LCH Latch LCIT Load Compressor Inlet Temperature LCK Lock LCL Local LCLU Landing Control Logic Unit LCM Least Common Multiple LCM Logic Control Module LCN Load Classification Number LCR Left-Center-Right LCT Line Current Transformer LCV Load Control Valve LD Load LD Left Display L/D Lift/Drag LDA Localizer-type-Directional Aid LDG Landing LDG Landing Gear LDG Loading LDG GR Landing Gear

LDI Landing Direction Indicator LDR Loader LE Leading Edge LE Log Entry L/E Leading Edge LED Light Emitting Diode LED Leading Edge Devices LEFDU Leading Edge Flap Drive Unit LE-FLP Leading Edge Flap LEMAC Leading Edge of Mean Aerodynamic Chord LEP List of Effected Pages LES Leading Edge Station LE STA Leading Edge Station LEV Lever LF Left Front LF Low Frequency LFEC Low Frequency Eddy Current LFDS Large Format Display System LFFS Lower Front Spar Station LFR Low Frequency Radio Range LFS Localizer Frequency Select LFT Left LG Landing Gear L/G Landing Gear LGA Landing Gear Cable "A" LGB Load Gearbox LGBV Landing Gear By-pass Valve LG CS Landing Gear Control Switch LGE Lounge LGE Large LGND Legend LGT Light LGTS Lights LGTV Landing Gear Transfer Valve LGW Landing Gross Weight LGWOW Left Gear Weight On Wheel LH Left Hand L-HR Lumin-Hour LI Limit Indicator LI Left Inboard LIB Left Inboard LIFO Last In First Out LIM Limit, Limitation LIM Laser Intensity Monitor LIMG Limiting LIM SW Limit Switch LIN Line LIN Linear L INBD Left Inboard LIN FT Linear Foot LIQ Liquid LIS Localizer Inertial Smoothing LJ Locating Jig LK Lock LKD Locked LKG Locking LL Latitude & Longitude LL Low Level L/L Latitude & Longitude LLAC Low Level Alternating Current LLAC Low Level AC voltage LLAR Lower Lobe Attendants Rest LLDC Low Level Direct Current LLDC Low Level DC voltage LLG Lower Lobe Galley LLS Left Line Select Key LLS Low-Level Solid Radioactive Material LLWAS Low Level Windshear Alerting System

26 REV. OCT. 00


LMC Least Material Condition LMG Left Main Gear LMM Localizer Middle Marker LMP Lamp LMP Left Middle Plug LMT Local Mean Time LMTR Limiter LN Left Nose LN Line Number L/N Line Number LNA Low Noise Amplifier LNAV Lateral Navigation L NAV Lateral Navigation L-NAV Lateral Navigation LNG Long LNGW Long Word LO Low LO Lock Out LO Left Outboard LO Local Oscillator L/O Layout LO2 Liquid Oxygen LOB Left Outboard LOC Localizer LOC Locate, Location LOCE Localizer Engaged LOCF Localizer Flag LOD Load LO FLO Low Flow LOG Logic LOG Logarithm LOGO Logogram, Logographic LOM Localizer Outer Marker LON Longitude LONG Longitude, Longitudinal LONGN Longeron LO PR Low Pressure LOP Low Oil Pressure LOP Log Of Pages LOPA Layout Of Passenger Accommodations LORAN Long Range Navigation L OUTBD Left Outboard LO Z Low Impedance LP Low Pressure LP Lightning Protector LP Loop LP Low Pass LPA Loop A LPB Loop B LPC Low Pressure Compressor LPC Low Pressure Core LP FCOC Low Pressure Fuel Cooled Oil Cooler LPI Lateral Path Integrator LPM Liters Per Minute LPO Landings Per Overhaul LPT Low Pressure Turbine LPTACC Low Pressure Turbine Active Clearance Control LPTC Low Pressure Turbine Cooling LP VALVE Low Pressure Valve LPW Lumens Per Watt LR Left Rear LRC Long Range Cruise LRCU Landing Rollout Control Unit LRM Line Replaceable Module LRRA Low Range Radio Altimeter LRS Load Relief System LRU Line Replaceable Unit LS Line Select Key

LS Loudspeaker LS Low Speed L/S Low Speed LSA Low Specific Activity Radioactive Material LSA Low Speed Aileron LSAP Loadable Software Airplane Parts LSB Lower Side Band LSB Least Significant Bit LSD Least Significant Digit LSDA Low Speed Digital to Analog LSDS Lavatory Smoke Detection System LSI Large Scale Integration LSK Line Select Key LSP Limit Select Panel LSP Low Speed LSPD Low Speed Digital to Analog LSR Load Shedding Relay LSSW Left Strut Switch LSU Lavatory Service Unit LT Light LT Left LT Teleloading LT Left Turn LTD Limited LTG Lighting LTK Load Tonne Kilometre LTL Loan Tool LTP Left Top Plug LTR Liter LTR Letter LTS Lights LTSHLD Light Shield LU Lubrication LUB Lubricate LUF Lower Usable Frequency LV Low Voltage LVDT Linear Variable Differential Transducer LVDT Linear Variable Differential Transformer LVDT Linear Velocity Differential Transducer LVDT Linear Voltage Displacement Transducer LVL Level LVL/CH Level Change LVL CHG Level Change LVPS Low Voltage Power Supply LVR Lever LVR Louver LW Landing Weight LW Left Wing LW Locked Wheel (protection) L/W Lockwire LWD Left Wing Down LWM Lower Weather Minimums LWR Lower LWS Left Wing Station L-x Lavatory-x

27 REV. OCT. 00


M Mach M Motor M Maneuvering Speed (EFIS) M Mode M Magenta M Meter M Minus M Magnetic M Maintenance M Milli M Manifold MA Milliamperes MA Maintenance Annunciator MA Master MA Missed Approach MAA Maximum Authorized IFR Altitude MAC Mean Aerodynamic Chord MAC Maximum Allowable Concentration MADAR Malfunction Detection Analysis and Recording Subsystem MADU Multi-purpose Aids Display Unit MAG Magnetic MAG Magnetic Heading MAG Magazine MAG Magneto MAG DEC Magnetic Declination Mag.M Magnetized Material MAGN Magnetron MAG TRK Magnetic Track MAG VAR Magnetic Variation MAI Multiplexer Action Item MAIDS Multipurpose Automatic Inspection and Diagnostic System MAIN Maintenance MAIN MUX Main Multiplexer MAINT Maintenance MALF Malfunction MALS Medium Intensity Approach Light System MAN Manual MANF Manifold MAP Ground Mapping MAP Master Annunciator Panel MAP Multi-Acquisition Processor MAP Missed Approach Point MAP Manifold Absolute Pressure MAP Mission Audio Panel MARS Maintenance Analysis and Reports Section MAS Milli-Ampere/Seconds MASI Mach and Airspeed Indicator M/ASI Mach Airspeed Indicator MAT Maintenance Alert Time MAT Maintenance Access Terminal MATL Material MAWEA Modularized Avionics and Warning Electronics Assembly MAWP Missed Approach Waypoint MAX Maximum MAX< Maximum Angle (climb) MAX CLB Maximum Climb MAX DES Maximum Descent MAX END Maximum Endurance MAX SPD Maximum Speed MB Millibars MB Marker Beacon M/B Metal Bond M/B Mother Board MBB Mode Bar Bias MBR Main Battery Relay

MBS Millibars MC Master Change MC Material Cost MC Megacycle Mc Corrected Mach MCA Minimum Crossing Altitude MCA Minimum Control-Air (speed) MCBF Mean Cycles Between Failures MCC Maintenance Control Center MCD Magnetic Chip Detector MCD Master Control Drawing MCDP Maintenance Control Display Panel MCDU Multipurpose Control Display Unit MCDU Multifunction Control Display Unit MCE Motor Control Enable MCG Minimum Control-Ground (speed) MCHENG Multi-Channel Engage MCi Millicurie MCL Maximum Climb (power) MCL Master Component List MCLM Microfilm MCP Mode Control Panel MCP Maximum Continuous Power MCP Modernization Commonality Program MCR Maximum Cruise MCR Master Change Request MCR Maximum Cruise (power) MCS Master Control Switch MCT Maximum Continuous Thrust MCU Modular Concept Unit MCV Main Control Valve MCW Modulated Continuous Wave MD Minimum Descent Altitude M/D Main Deck MDA Minimum Descent Altitude MDA Minimum Decision Altitude MDAU Modular Data Acquisition Unit MDF Medium Frequency Direction Finding Station MDH Minimum Decision Height MDI Master Dimensioning Index MDL Module MDL Middle MDLC Maneuvering Direct Lift Control MDR Maintenance Delay Report MD&T Master Dim & Test MD/T Master Dim & Test MDU Multiplier Divider Unit ME Mechanical Equipment (tool) MEA Minimum Enroute Altitude MEAS Measurement MEC Main Equipment Center MEC Main Engine Control MEC Main Engine Controller MECH Mechanic, Mechanical MECH Mechanism MED Medium MED Main Entry Door MED Mode Engage Disable MED Medical MEDB Model Engine Data Base MEK Methyl Ethyl Keytone MEKP Methyl Ethyl Keytone Peroxide MEL Minimum Equipment List MEM Memory MENH Mechanical and Engine Handling MEP Mean Effective Pressure MES Main Engine Strut MES Main Engine Start

28 REV. OCT. 00


MESC Mid Electrical Service Center MET Meteorological MEV Main Electro Valve MEV Million Electron-Volts MEW Manufacturers Empty Weight MF Medium Frequencies MF Mach Feel MFA Memorized Fault Annunciator MFC Mechanical Fuel Control MFD Multifunction Display MFD Manufactured MFDS Manifold Failure Detection MFG Manufacturing MF MOT Mach Feel Motor MFP Main Fuel Pump MFP Mixed Fission Products MFR Manufacturer MFR IDENT Manufacturer Identification MFST Manifest MG Motor Generator MG Milligram MGB Main Gear Box MGD Million Gallons per Day MGMT Management MGOS Maintenance and Ground Operations Systems MGR Manager MGS Main Gear Switch MGSCU Main Gear Steering Control Unit MGSS Main Gear Steering System MGT Management MGTW Maximum Gross Taxi Weight MH Millihenry MHDG Magnetic Heading MHR Magnetic Heading Reference MHRS Magnetic Heading Reference System MHSU Magnetic Heading Sensor Unit MHz Megahertz MI Miles MI Magnetic Indicator MI Indicated Mach MIBK Methyl Isobutyl Keytone MIC Microphone MICRO-P Microprocessor MID Middle MIDO Manufacturing Inspection District Office MI/HR Miles per Hour MIKE Microphone MIL Military Specifications MIL-SPEC Military (part) Specifications MIL-STD Military Standards MIN Minimum MIN Minute MIN ALT Minimum Altitude MIN FUEL Minimum Fuel MIN SPD Minimum Speed MIN TIME Minimum Time MIP Maintenance Information Printer MIPO Manually Issued Purchase Order MISC Miscellaneous MI/SEC Miles per Second MIT Miscellaneous Tool MITP Metal In Tailpipe MIX Mixed Present Position MK Mark MKR Marker MKR BCN Marker Beacon ML Milli-Liter ML Milli-Lambert

M/L Material List MLD Molded MLG Main Landing Gear MLGWW Main Landing Gear Wheel Well ML/O Metal Layout MLS Microwave Landing System MLU Monitor and Logic Unit M&LU Monitor and Logic Unit MLW Maximum Landing Weight MM Maintenance Manual MM Maintenance Monitor MM Middle Marker MM Millimeter MMAP Mission Maintenance Audio Panel MMC Maximum Material Condition MMEL Master Minimum Equipment List MMF Maintenance Module Fault (EIS Code) MMH/FH Maintenance Man Hours per Flight Hour MMO Maximum Operating Mach MMR Multimode Receiver M MUX Main Multiplexer MN Main MN Minute MN Mach Number MNFST Manifest MNL Manual MNPS Minimum Navigation Performance Specification MNTD Mounted MNVR Maneuver MO Month MOA Make On Assembly MOCA Minimum Obstruction Clearance Altitude MOD Module MOD Modification, Modified MOD Modulator MOD Model MOH Measure Of Hardness MOL WT Molecular Weight MOM Momentary MON Monitor, Monitored MONG Monitoring MONO Monaural MOPS Minimum Operational Performance Standards MOS Metal Oxide Semiconductor MOS Method of Shipment (Sonic) MOSFET Metallic Oxide Semiconductor Field Effect Transistor MOSV Motor Operated Shutoff Valve MOT Motor MOT Motion MOU Memorandum Of Understanding MP Maintenance Practices MP Modification Proposal MP Microprocessor MPA Maximum Power Assurance MPB Micro Processor Bipolar MPCB Main Power Circuit Breaker MPCS Minimum Pressure Control System MPD Maintenance Planning Data MPD Maintenance Planning Document MPDTM Master Planning Document Task Masterfile MPG Miles Per Gallon MPH Miles Per Hour MPL Maximum Permitted Life MPLX Multiplexer MPR Multipurpose Register MPS Maximum Performance Specifications MPS Multiplex Power Supply

29 REV. OCT. 00


MPS Maintenance Programs Subcommittee (ATA) MPSOV Minimum Pressure and Shut-off Valve MPU Magnetic Pickup MPU Magnetic Pickup Unit MPU Microprocessor Unit MR Modification Revision MRA Minimum Reception Altitude MRB Maintenance Review Board MRBPB Maintenance Review Board Policy Board (FAA) MRC Maximum Range Cruise MRR Mechanical Reliability Reports MRR Miscellaneous Retrofit Requirement MRS Malfunction Reporting Systems MS Mid Spar MS Milliseconds MS Military Standard M/S Mail Stop M/S Modal Suppression M/S Mid Spar MSA Minimum Safe Altitude MSAS Model Stability Augmentation System MSB Most Significant Bit MSC Multi Shield Connection MSC Miscellaneous System Controller MSCM Miscellaneous Switching Control Module MSD Most Significant Digit MSD Multiple Site Damage MSDS Material Safety Data Sheet MSEC Milliseconds M/SEC Meters per Second MSG Message MSG Maintenance Steering Group MSG Maintenance Systems Guide MSI Maintenance Significant Item MSI Medium Scale Integrated MSL Microwave Landing System MSL Mean Sea Level MSL Maintenance Service Letter MSM Maintenance Schematic Manual MS M Minutes Slew-Month MSN Mission MSP Mode Select Panel (EFIS) M-SPD Manual Speed MSS Mid Spar Station MSS Mode Selector Switch MST Master MSTCLR Master Clear MSTR Master MSU Mode Selector Unit MSU Magnetic Sensor Unit MSW Microswitch MT Mach Trim MT Manual Trip MT Mount MT Maintenance Tip MTA Mach Trim Actuator MTBCR Mean Time Between Confirmed Removal MTBD Mean Time Between Defects MTBF Mean Time Between Failure MTBI Mean Time Between Inspection MTBIFS Mean Time Between In Flight Shut-down MTBPR Mean Time Between Premature Removals MTBR Mean Time Between Removals MTBT Mean Time Between Trouble MTBUR Mean Time Between Unscheduled Removal MTCHG Matching MTD Manufacturing Technical Directive MTE Manual Test Equipment

MTG Miles To Go MTG Muting MTG Mounting MTGC Mounting Center MTGW Maximum Taxi Gross Weight MTIP Maintenance Tip MTL Minimum Triggering Level MTL Minimum Threshold Level MTN Motion MTOGW Maximum Takeoff Gross Weight MTOP Maintenance Task Operating Plan MTOW Maximum Takeoff Weight MTP Maintenance Test Panel MTR Motor MTR Meter MTR Master Tool Record MTRG Metering MTS Mach Trim System MTS Maintenance Training Simulator MTTF Mean Time To Failure MTTR Mean Time To Repair MTTR Mean Time To Removal MTW Maximum Taxi Weight MTXW Maximum Taxi Weight MU Management Unit Mu Millimicron MUF Maximum Usable Frequency MUI Multiple Usage Item MULT Multiple, Multiplication MUS/VOL Music Volume MUX Multiplex, Multiplexer MV Magnetic Variation MV Millivolt MV Multivibrator MV Metering Valve MV Mach Validity MVAR Magnetic Variation MVP Moisture Vapor Proof MVR Magnetic Variation MVT Movement MW Milliwatt M/W Mates With M/W Master Warning MWARN Master Warning MWC Master Warning Computer MWC Main Wheel Circuit Card MWCC Master Warning Caution Controller MWP Master Warning Panel MWS Master Warning System MX Multiplex MZFW Maximum Zero Fuel Weight

30 REV. OCT. 00


N North N Normal N Neon N Newton N1 Engine Fan Speed N1 Low Pressure Compressor N1.D N1 Descent N1.L N1 Latch N2 Engine Rotor Speed N2 Intermediate Pressure Compressor (RB211) N2 High Pressure Compressor (JT9D) N2C Corrected N2 Speed N3 High Pressure Compressor NA Normal Accelerometer NA Not Applicable NA Not Available N/A Not Available N/A Not Applicable NAC Nacelle NACA National Advisory Committee for Aeronautics NAC BL Nacelle Buttock Line NAC STA Nacelle Station NAC WL Nacelle Waterline NAI Nacelle Anti-Ice NAK No Acknowledgment NAM Nautical Air Miles NAM Normal Accelerometer Monitor NAR No Action Required NAS National Aerospace Standards NAS National Aircraft Standards NAS National Aeronautical Standards NASA National Aeronautics and Space Administration NATL National NAUT Nautical NAV Navigate, Navigation NAV ADC Navigation Air Data Computer NAVAID Navigation Aid NAV RAD Navigation Radio NBL Nacelle Buttock Line NBR Number NBS National Bureau of Standards NC Normally Closed NC Not Connected, No Connection NC Numeric Control NC Normal Checklist N/C Numerical Control NCD No Computed Data NCFAL Non-Critical Fault Word Logic NCP Navigation Control Panel NCT Neutral Current Transformer NCU Navigation Control Unit NCU Navigation Computer Unit NCV Navigation Computer Valid ND Navigation Display ND Nose Down NDAR Newly Delivered Airplane Report NDB Non-Directional Beacon NDB Non-Directional Radio Beacon NDB Navigation Data Base NDI Non-Destructive Inspection NDT Non-Destructive Test NEC National Electrical Code NEG Negative NEUT Neutral, Neutralizing NFC Not Fully Closed NFO Not Fully Open NG Gas Generator RPM NGT Night

NGV Nozzle Guide Vanes NGWOW Nose Gear Weight On Wheel Nh HP Compressor RPM NHA Next Higher Assembly NI Not Interchangeable N/I Not Interchangeable NICAD Nickel-Cadmium NIL Engine Speed Limit NITE Night Nl LP Compressor RPM NLG Nose Landing Gear NLGWW Nose Landing Gear Wheel Well NLT No Later Than NM Nautical Mile Nm Moment (Newtonmeter) NMI Nautical Mile NMI Non Maskable Interrupt N MI Nautical Mile N MOS Negative Metal Oxide Semiconductor N MOS N-Channel Metal Oxide Semiconductor NNC Non-Normal Checklist NO Normally Open NO Normal Operation No. Number NOB Number One Bearing NOM Nomenclature NOM Nominal NOMEN Nomenclature NonflaG Non-Flammable Compressor Gas NON STD Non Standard NOPT No Procedure Turn Required NOR Normal NOR Normal Operating Range NORM Normal NOZ Nozzle NP Non Procurable NP New Part Np Propeller RPM N/P Next Page N/P Nut Plate NPN Negative-Positive-Negative NPRM Notice of Proposed Rule Making NPT National Taper Pipe (Thread) Npt Power Turbine Speed NPV Net Present Value NR Nose Restraint NRC Non-Routine Card NRM Normal NRMP Non-Reversible Motor Pump NRP Navigation Reference Point NRW Net Recoverable Weight NRZ Non-Return-to-Zero NRZM Non Return to Zero Modified NS No Smoking N/S New Subject NSC Notice of Status Change NSEC Nanoseconds NSS Neutral Shift Sensor NSTA Nacelle Station NSV Negative Sequence Voltage NTS Not To Scale NTSB National Transportation Safety Board NU Navigation Unit NU Not Used NUM Numerical NV North Velocity NVM Non-Volatile Memory NVMEM Non-Volatile Memory

31 REV. OCT. 00


NVMEM RD Non-Volatile Memory Read Error NVMEM WR Non-Volatile Memory Write Error NVRM Non-Volatile RAM NW Nose Wheel N/W Nose Wheel NWL Nacelle Waterline NWS Nose Wheel Steering

O Open O Orange O Operations O2 Oxygen OAD Output Analog Discrete OAP Output Audio Processor OAS Outer Air Seal OAT Outside Air Temperature OB Outboard OBJ Object OBJT Object OBS Observer OBS Omni Bearing Selector OBS Obsolete OBSVR Observer OC Over Current OC On Condition OC On Course OC Order Card O/C On Course O/C Open Circuit OCC Occupied OCCPD Occupied OCCPNT Occupant OCL Obstacle Clearance Limit OCS Obstacle Clearance Surface OCT Octane OD Outside Diameter OD Out of Detent O/D Out of Detent ODAR Organizational Designated Airworthiness Representative OEM Original Equipment Manufacturer OEU Overhead Electronics Unit OEV Overboard Exhaust Valve OEW Operating Empty Weight OF Over Frequency OF Overfull OF Outside Force OFCR Officer OFFR Off/Reset OFF R Off-Reset OFL Outflow OFP Operational Flight Program OFS Offset OFSS Outboard Front Spar Station OFST Offset O/FULL Overfull OFV Outflow Valve OGV Outlet Guide Vane OH Overheat O/H Overheat OHM Overhaul Manual OHME Overhead Mechanical Equipment (tool) OHU Overhead Unit OIG Office of Inspector General OJT On-the-Job Training OK Correct OLES Outboard Leading Edge Station OLS Oil Level Sensor OLW Operational Landing Weight OM Outer Marker OM Overhaul Manual OM Operations Manual OMB Operations Manual Bulletin OML Outside Mold Line OMS Onboard Maintenance System OMTBF Observed Mean Time Between Failure

32 REV. OCT. 00


ON-ORD On Order (Sonic) ONS Omega Navigation System O-OEU Outboard Overhead Electronics Unit OP Operational, Operation, Operating OP Open Phase OP Open OP Oil Pressure OP Operating Procedure OP Opalescent OP Operational (check) O/P Output OP-AMP Operational Amplifier OPAS Overhead Panel ARINC System OPBC Overhead Panel Bus Controller OPC Operational Program Configuration OP/C Operational Check OPER Operative, Operational O/PFDV Other Pitch Flight Director Valid OPN Operation OPNG Opening OPP Opposite OPR Operate OPR Operator OPRN Operation OPS Operation, Operations OPT Optimum OPT Optical OPT Option, Optional OPTL Optional OPV Overpressure Valve OR Overrotation ORD Ordinance ORD RCD Order Received (Sonic) ORF Orifice ORG Orange ORG Organization Org Per Organic Peroxide ORIDE Override O/RIDE Override ORIG Origin, Original, Originator ORN Orange ORT Owner’s Requirements Table (software database) ORZ Omni Range Zero OS Over Station OS Oversize OS Out of Service O/S Over Station O/S Overspeed O/S Oversize OSC Oscillator, Oscillation OSC Oscilloscope OSG Oscillograph OSS Over Station Sensor OSS Outboard Slat Stations OSH Occupational Safety and Health OSU Overdoor Service Unit OT Oil Temperature O/T Over Temperature OTOW Operational Take-Off Weight OUT Outlet OUT Output OUTB Outboard OUTBD Outboard OUTPT Output OUTR Outer OV Over OV Over Voltage OVBD Overboard

OVCO Over Voltage Cutout OVDR Over Door OVF Over Frequency OVFL Overfill, Overflow OVHD Overhead OVHL Overhaul OVHT Overheat OV/HT Overheat OVLD Overload OVPRESS Overpressure OVRD Override OVRHT Overheat OVSP Overspeed OVV Overvoltage OVWG Overwing OW Outer Wing OW One Way OWE Operating Weight Empty OXY Oxygen Oxy M Oxidizing Material OZ Ounce OZ-FT Ounce-Foot OZ-IN Ounce-Inch (torque)

33 REV. OCT. 00


P Primary P Panel P Pressure P Purple P Pink P Pitch P Plus P Page P2 Inlet Air Pressure P5 Exhaust Gas Pressure P25 HPC Inlet Pressure P49 HPT Exhaust Pressure P4.95 Turbine Exhaust Pressure PA Passenger Address PA Public Address PA Power Amplifier Pa Pascal PA AMP Passenger Address Amplifier PAC Passenger Address Controller PA/CI Passenger Address/Cabin Interphone PAH Pitch Attitude Hold PAL Pressure Altitude PAL Programmable Array Logic PALCS Passenger Address Level Control Sensor P.ALT Profile Altitude PAM Pitch Autopilot Module PAM Pulse Amplitude Modulation PAM Performance Assessment Monitor PAMB Ambient Pressure PAR Precision Approach Radar PAR Parallel PAR Periodic Activity Report PARAM Parameter PARA/SER Parallel to Serial PARS Periodic Activity Reports PAS Passenger Address System PASS Passenger PAT Pitch Attitude Trim PA T/R Passenger Address Tape Reproducer PAX Passenger, Passengers PAX Passenger Announcement Entertainment and Service Multiplex System PAX TEL Passenger Telephone PB Burner Pressure PB Pushbutton P/B Pushbutton PBACK Pushback PBE Protective Breathing Equipment PBI Polybenzimidazole PBM Pressure Bias Modulation (antiskid) P/BSW Pushbutton Switch PC Printed Circuit PC Packing Card PC Pitch Computer PC Control Pressure PC Pulsating Current PC Production Certificate (FAA) PC Personal Computer P/C Printed Circuit P/C Percent PCA Power Control Actuator PCA Printed Circuit Assembly PCA Positive Control Airspace PCAM Pitch Camout P CAP Partial Glide Slope Capture PCB Printed Circuit Board PCD1 Compressor Discharge Pressure-First Stage PCD2 Compressor Discharge Pressure-Second Stage

PCE Personal Consumption Expenditures PCF Passenger Cum Freighter PCH Patch P.CLB Profile Climb PCM Pulse Code Modulation PCMCIA Personal Computer Memory Card International Association P CMD Pitch Command Valid PCN Pavement Classification Number PCND Precondition Fail PCP Power Control Package PCP Pilot Call Panel PCR Publications Change Request PCR Production Change Record PCT Percent, Percentage PCU Power Control Unit PCU Passenger Control Unit PCU Propeller Control Unit PCV Proportional Control Valve PCW Pitch Control Wheel PCWS Pitch Control Wheel Steering PCZ Positive Zone Control PD Pitch Diameter PD Datum Pressure PD Performance Data PDB Performance Data Base PDC Performance Data Computer PDC Procurement Data Card PDCS Performance Data Computer System PDDC Provisioning Descriptive Data Card P.DES Profile Descent PDI Pictorial Deviation Indicator PDIU Propulsion Discrete Interface Unit PDL Portable Data Loader PDM Post Delivery Modification Material PDOS Powered Door Opening System PDP Power Distribution Panel PDRC Procurement Data Reference Card PDS Primary Display System PDSV Pressure Drop and Spill Valve PDT Pole Double Throw PDU Power Drive Unit PDU Pneumatic Drive Unit PDU Pilot Display Unit PE HP Stage Air Pressure PE Purchased Equipment PED Pedestal PED Portable Electronic Device PEEPLS Passenger Emergency Escape Path Lighting System PEL Permissible Exposure Limits PEM Performance Engineer's Manual PEP Peak Envelope Power PEPC Primary External Power Contactor P.EPR Profile EPR PERC Percussion PERF Performance PERF INT Performance Initialization PERM Permanent PERS Personnel PES Passenger Entertainment System PES Production Engineering Specification PES Pitch Enhancement System PETRO Petroleum PF Pitch Force PF Pitch Feel PF Power Factor PF Pulse Frequency

34 REV. OCT. 00


PF Pre Flight PF Profile PF Pilot Flying PF Package Freighter pF Picofarad PFC Primary Flight Computer PFCS Primary Flight Control System PFCS Powered Flight Control Surfaces PFD Primary Flight Display PFI Post Flight Inspection PFO Parallel Feeder Open PF/T Preflight/Transit PF TA Pitch Feel and Trim Assembly PG Page PG BUS Program Bus PGM Program PH Phase PH Precipitation Hardening PHD Pitch Hook Disengaged PHE Pitch Hook Engaged PHI Bank Angle PHL Pitch Hook Limit PHP Pounds per Horsepower PHR Pounds per Hour PHS Pitch Hook Sync PHYS Physical PI Procedure Turn to an Intercept PI Performance Index PI Production Illustration PIA Peripheric Interface Adaptor PIA Programmable Interface Adapter PIC Product Identification Code PIDS Primary Ice Detection System PIE Pride In Excellence PIIC Passenger In-flight Information Computer PIMU Propulsion Interface Monitor Unit PINT Pitch Integrator PINT Integrated Pressure PIP Product Improvement Package PIR Pressure Interstage Return PIR Pump Interstage Regulator PIREP Pilot's Report PIS Passenger Information Sign PIX Picture PJTR Projector PK Park PK Pink PK Pack PKG Parking PKG Package PKS Packs (air conditioning) PL Place PL Plate PL Plug PL Parts List PL Pilot Landing P/L Payload PLA Power Lever Angle PLA Programmed Logic Array PLAC Placard PLAT Programmed Lateral Assurance Test PLAT Programmed Localizer Assurance Test PLATF Platform PLD Payload PLF Present Leg Faults (CMC) PLI Pitch Limit Indicator PLI Pitch Limit Indication PLI Preload Indicating

PLL Phase Lock Loop PLN Plan PLNG Planning PLS Pulse PLSTC Plastic PLT Pilot PLTS Pilots PLYWD Plywood PM Phase Modulation PM Permanent Magnet PM Pounds per Minute PM Power Monitor PM Manifold Pressure PMA Permanent Magnet Alternator PMA Parts Manufacturer Approval (FAA) PMA Portable Maintenance Aid P.MACH Profile Mach PMAT Portable Maintenance Access Terminal PMB Plastic Media Blasting PMC Power Management Computer PMC Power Management Control PMC Power Management Controller PMC Performance Management Computer PMC Process Material Control PMD Programmable Memory Device PMD Programmed Memory Device PMDB Production Management Data Base PME Portable Mechanical Equipment (tool) PMG Permanent Magnet Generator PMI Principle Maintenance Inspector (FAA) PML Precision Measurement Laboratory PMO Program Management Organization PMP Pump PMR Performance and Maintenance Recorder PMS Performance Management System PMUX Power Plant Multiplexer PMUX Propulsion Multiplexer PN Part Number P/N Part Number PN1 First Part Number (Sonic) P.N1 Profile N1 PN2 Second Part Number (Sonic) PNC Part Number Code PNCS Performance Navigation Computer System PNEU Pneumatic PNF Pilot Not Flying PNFF Pitch No First Failure PNL Panel PNP Positive-Negative-Positive PNUTT Platform Not Up To Temperature PO Outside Air Pressure PO Pickoff PO Power On PO Purchase Order PO Polarity Po Inlet Total Pressure PODS Pneumatic Overheat Detection System POI Principle Operations Inspector POR Point Of Regulation POR Power On Reset PORT Portable POS Position POS Positive POS INT Position Initialization POSIT Position POSN Position POS REF Position Reference POT Potentiometer

35 REV. OCT. 00


POT W Potable Water PP Power Plant PP Power Plant Pylon PP Peak to Peak PP Push-Pull P/P Program Pin PPB Provisioning Parts Breakdown PPBL Power Plant Buttock Line PPBM Power Plant Buildup Manual PPBU Power Plant Build Up PPC Phosphor Protection Circuit PPDC Provisioning Procurement Data Card PPDES Product Performance Data Exchange Specifications PPH Pounds Per Hour PPI Plan Position Indicator PPM Parts Per Million PPM Pounds Per Minute PPOS Present Position PPR Paper P/P ROM Preprocessor ROM PPS Power Plant Station PPS Pilots Performance System PPS Pulses Per Second PPS Precision Positioning Service (GPS) PP/S Pulse Pairs per Second PPWL Power Plant Water Line PQAS Program Quality Assurance System PR Power Relay PR Pressure PR Pair PR Regulated Pressure PR Reference Pressure PR Pitch Rate PR Partial Revision PR Photorecorder P/R Pitch Rate PRAM Prerecorded Announcement Machine PRBC Pressure Ratio Bleed Control PRC Pressure Ratio Control PRCLR Precooler PRCS Processor PRCSG Processing PRCSR Processor PRE Protective Equipment PREAMP Preamplifier PRECIP Precipitation PRED Prediction PRE-ENG Pre-Engage PREFAB Prefabricated PRE FLT Pre Flight PRELIM Preliminary PREP Prepare PRES Present PRES POS Present Position PRESS Pressure, Pressurization PREV Previous PRF Pulse Rate Frequency PRF Pulse Repetition Frequency PRFM Performance PRG FLOW Program Flow error (MCDP) PRGM Program PRG MEM ROM Memory error (MCDP) PRI Primary PRIM Primary PRIN Principle PRL Parallel PRL Parallel Rudder Logic

PRN Parts Requirement Notice PROC Procedure PROC Processor PRO CAL Processed Comparator Autoland PROC T Procedure Turn PROD Production PROF Profile PROG Progress PROG Program PROJ Project, Projector PROM Programmable Read Only Memory PROP Propellant PROS Present Position PROT Protection, Protective PROT Protractor PROTN Protection PROTO Prototype PROV Provision PROX Proximity PRPHL Peripheral PRPHR Peripheral PRR Production Revision Record PRR Pulse Repetition Rate PRR-R Production Revision Record, Retrofit only PRSM Pitch/Roll Servo System Monitor PRSOV Pressure Regulating and Shut Off Valve PRSODV Pressure Raising Shutoff and Dump Valve PRSRZ Pressurize PRST Partial Reset P/RST Press to Reset, Push to Reset PRSV Pressure Regulator & Shutoff Valve PRT Partial Revision Telex PRT Pulse Repetition Time PRV Pressure Regulating Valve PRV Pressure Relief Valve PRV Pressure Reducing Valve PRVC Pressure Regulating Valve Controller PS Power Supply PS Pressure Switch PS Process Solution PS Pitot Static Ps Static Pressure P/S Pitot/Static P-S Parallel to Series PS2 Compressor Inlet Static Pressure PS3 11th Stage Air Pressure PSA Power Supply Assembly PSAMB Ambient Static Pressure PSC Present Course PSC Pneumatic System Controller PSCL Predicted Safe Cycle Life PSD Process Specification Departure PSE Principle Structural Element PSEQ Phase Sequence PSEU Proximity Switch Electronics Unit PSEU Proximity Sensor Electronics Unit PSF Pounds per Square Foot PSFL Pressure Sensitive Flow Limiter PSGR Passenger PSH Pre-Select Heading PSH Present Heading PSI Pounds per Square Inch PSIA Pounds per Square Inch Absolute PSID Pounds per Square Inch Differential PSIG Pounds per Square Inch Guage PSM Power Supply Module PSM Power Supply Monitor PSM Passenger Service Module

36 REV. OCT. 00


PSN Position PSNR Positioner PSPA Power Supply and Pulser Assembly P.SPD Profile Speed PSPL Peculiar Spare Parts List PSR Primary Surveillance Radar PSRAB Propulsion System Reliability Assessment Board PSS Passenger Service System PSS Proximity Switch System PSTA Primary Stabilizer Trim Actuator PSU Passenger Service Unit PSU Power Supply Unit PSUD Passenger Service Unit Decoder PSV Planned Shop Visit PT Total Pressure PT Point PT Pint Pt Part Pt Pitot, Pitot Pressure PT2 Engine Inlet Pressure PT2 Compressor Inlet Total Pressure PT4.95 Exhaust Gas Pressure PTA Power Transfer Actuator PTC Pack Temperature Controller PTC Positive Temperature Coefficient PTCH Pitch PT CODE Part Code PTCTN Protection PTDC Provisioning Technical Data Card PTFE Polytetraflouroethane PTH Path PT I Pitch Trim Inhibit PTL Purchased Tool PTM Performance Training Manual PTM Pilot Training Manual PT MOT Pitch Trim Motor PTO Power Takeoff PTR Printer PTR Push To Reset PTT Push To Talk, Press to Talk PTT Push to Test, Press to Test PTU Power Transfer Unit PTU Power Transformer Unit PTW Pitch Trim Wheel PTY Parity PU Pick Up PU Panel Unit P/U Pick Up PUB Publication PUL Pulley PULV Pulverize, Pulverizer PUR Purple PURS Purser PV Priority Valve PVA Polyvinyl Alcohol PVB Polyvinyl Butyral PVC Polyvinyl Chloride PVD Para Visual Display PVD Para Visual Director PVDC Para Visual Display Computer PVIS Passenger Video Entertainment System PW Pratt-Whitney PWGC Pulse Width Gain Control PWM Pulse Width Modulation PWM Pulse Width Modulator PWR Power PWR DR Power Drive PWR SPLY Power Supply

PWS Predictive Windshear PYL Pylon PYRO Pyrotechnic

37 REV. OCT. 00


Q Pitch Rate Q Torque QA Quality Assurance QAD Quick Attach-Detach QAI Quality Assurance Item QAR Quick Access Recorder QC Quality Control QC Quick Change QC Quality Check Qc Dynamic Pressure QCCR Quality Control Change Request QCDS Quality Control and Distribution System QCE Quality Control Engineering QCR&D Quality Control Research and Development QCS Quiet Climb System (FMC) QD Quick Disconnect Q DISC Quick Disconnect QDRNT Quadrant QDT Quadrantal QE Quadrantal Error QEC Quick Engine Change QEC Quadrantal Error Correction QEC Quadrantal Error Corrector QECU Quick Engine Change Unit QFE Field Elevation Atmosphere Pressure QFE Field Elevation Pressure QIC Quality Improvement Center QNE Sea Level Standard Atmosphere Pressure QNH Atmosphere Pressure at Sea Level QNH Baro Pressure Setting for in Route Altitude QNH Destination Altimeter Setting QPA Quantity of Parts per Airplane QPL Qualified Products List QPL Qualified Parts List Q-POT Pressure Potentiometer QPRI Qualitative Personnel Requirements Information QQI Quantitative Quality Indicator QRH Quick Reference Handbook QT Quart QTE Quote QTR Quarter QTS Quarts QTY Quantity QTZ Quartz QUAD Quadrant QUAL Quality

R Right R Red R Reset R Resistor R Yaw Rate R Roll R Ramp R Range R Radius R Rankine (degrees) R Repeat Interval RA Radio Altitude RA Radio Altimeter RA Redundancy Assurance RA Rain RA Resolution Advisory R/A Radar Altimeter R/A Radio Altitude RABS Reverse Actuated Bleed System RAC Rules of the Air and Air Traffic Control RACON Radar Beacon RAD Radio RAD Radial RAD Radian RAD Radiation Dosage RAD Roll Anticipation Distance RadM Radioactive Material RAE Ram Air Exit RAEA Ram Air Exit Actuator R/AF Radio Altimeter Flag RAI Ram Air Inlet RAIA Ram Air Inlet Actuator RAIL Runway Alignment Indicator Light System RAM Random Access Memory RAPCON Radar Approach Control RA RT Radio Altimeter Receiver Transmitter RAT Ram Air Turbine RAT Ram Air Temperature RATG Repairs Assessment Task Group RAV Radio Altitude Valid RAX Random Access Transfer Memory RB Right Body R/B Replaced By (IPC) RBA RMI Bearing Indicator RBA Rigid Bus Assembly RBBL Right Body Buttock Line RBL Right Buttock Line RBN Radio Beacon RBP Right Bottom Plug RBTR Right Bus Tie Relay RC Roll Computer RC Rate Comparator RC Repetitive Chime RC Rate of Change RC Replacement Code R/C Rate of Climb RCAF Repeat Course Alpha Fail RCAG Remote Center Air-to-Ground RCAM Roll Camout RCC Remote Charge Converter RCCB Remote Controlled Circuit Breaker RCD Recording RCDR Recorder RCDU Remote Control Display Unit RCDU Right Control Display Unit RCL Recall RCLM Runway Center Line Marking RCLS Runway Center Line Lift System

38 REV. OCT. 00


RCM Ratio Changer Module RCMDE Roll Command Enable RCP Radio Communications Panel RCP Reverse Current Protection RCPT Receptacle RCPTN Reception RCV Receive RCVD Received RCVR Receiver RCWS Roll Control Wheel Steering RCVY Recovery RD Right Display RD Read R/D Radial & Distance R/D Rate of Descent R&D Research and Development RDDMI Radio Digital Distance Magnetic Indicator RDDMI Radio Digital Distance Measuring Indicator RDF Radio Direction Finder RDG Reading RDMI Radio Distance Magnetic Indicator RDNG Reading RDP Roller Drive Power RDR Radar RDR XMTR Radar Transmitter RDS Radial Drive Shaft RDY Ready RE Regarding RE Reynolds number REAC Reactor REC Record, Recorder RECD Received RECD Recorded RECEPT Receptacle RECIP Reciprocating RECIR Recirculation RECIRC Recirculate, Recirculation RECIRC Recirculating RECM Recommend RECOG Recognition RECON Reconnaissance RECOV Recovery RECP Receptacle RECT Rectifier RECT Rectangle RED Reduction REDUND Redundancy REF Refer, Reference REF ALIGN Reference Alignment REFL Reflected REFLD Reflected REFLNG Refueling REF PT Reference Point REFRAC Refractory REFRIG Refrigerate, Refrigeration REG Regulate, Regulator, Regulating REG Regulation REG Register, Registry REGEN Regenerative REIL Runway End Identification Lights REINF Reinforce REJ Rejected, Rejection REL Release REL Relief REL Reluctance REL Relay RELIAB Reliability RELOC Relocate, Relocated

REM Remote REM Remove REM Roentgen Equivalent Man REMS Removals (unscheduled) REP Representative REP Repellant REP Reporting Point REP Reproducer REP Repair REPEL Repellent REPL Replace, Replacement REPL BY Replaced By REPRO Reproducer REQ Require, Required REQ Request, Requested, Requisition REQD Required RES Reserve RES Resistance, Resistor RES Research RESP Response REST Restriction RESTR Restricted RESV Reserve RESYNC Resynchronize, Resynchronization RET Retract RET Retard RETF Return to Field RETR Retract, Retractable RETRD Retracted RETRG Retracting RETRN Retraction REU Remote Electronics Unit REV Reverse REV Reverser REV Revise, Revision REV Revolution REV Reversion REW Rewind REW Recoverable Empty Weight RF Radio Frequency RF Right Front RF Refill RF Reference RFC Request For Change RFCC Reverse Flow Check Controller RFCS RF Combiner/Splitter RFDA RF Distribution Amplifier RFI Radio Frequency Interference RFL Refuel RFL Reflected RFM Rotocraft Flight Manual RFP Request For Proposal RFS Reason For Selection RFS Regardless of Feature Size RFU Radio Frequency Unit RFW Request For Work RGDS Regards RGLRD Regulated RGLTD Regulated RGLTG Regulating RGLTN Regulation RGLTR Regulator RGTR Register RGWOW Right Gear Weight On Wheel RH Right Hand RH Relative Humidity R/H Radar Height RHE Rudder Hook Engaged

39 REV. OCT. 00


RHK Rudder Hook Monitor RHM Rudder Hook Monitor R/hr Roentgens per Hour RI Right Inboard RI Rate of Issue R/I Radio/Inertial R/I Remove/Install, Removal/Installation R/I Repetitive Inspection RIB Right Inboard RINT Roll Integrator RIV Rivet RJB Radio Junction Box RK Rack RK Repair Kit RLF Relief RLG Ring Laser Gyro RLOC LOC Receiver RLS Right Line Select key RLS Remote Light Sensor RLSE Release RLSED Released RLTD Related RLY Relay RLY/SW Relay/Switch RM Room RM Reversion Mode RM Raw Material RMCU Remote Magnetic Compensation Unit RMG Right Main Gear RMI Radio Magnetic Indicator RMM Ramp Maintenance Manual RMP Right Middle Plug RMP ENG Rudder Mod Piston Engaged RMS Root Mean Square RMT Remote RMTE Remote RMT OUT High-Speed ARINC Output RMU Remote Management Unit RN Right Nose RNAV Radio Navigation R NAV Radio Navigation RNG Ring RNG Range RNI Radio Navigation Indicator RNP Required Navigation Performance (FMC) RO Right Outboard RO Rollout RO Repair Order R/O Rho-Rho (DME-DME) R/O Rollout RO ALT Rollout Altitude ROB Right Outboard ROLT Reorder Lead Time ROM Read Only Memory ROM Rollout Mode RON Remain Overnight RO PCU Rollout Power Control Unit ROT Rotate, Rotation, Rotary RP Reverser Position RP Reinstate Part RPCM Rudder Power Control Module RPCP Rollout Power Control Package RPCU Rollout Power Control Unit RPDR Reproducer RPG Report Program General RPL Replace RPL Repellent RPLNT Repellent

RPLS Replaces RPLSD Replaced RPM Revolutions Per Minute RPP Reflected Power Present RPS Revolutions Per Second RPTG Reporting RPTG Repeating RPTR Repeater RPU Receiver Processor Unit RQ Recommended Quantity RQMT Requirement RQRD Required RR Rapid Revision RR Right Rear RR Rolls Royce RR Radio Range Station RR Rudder Rib R/R Rho-Rho (DME-DME) R&R Remove and Replace RRAM Receiver RAM RRC Rudder Ratio Changer RRC Rudder Rollout Control RRCA Rudder Ratio Changer Actuator RRCBV Rudder Ratio Changer Bypass Valve RRCM Rudder Ratio Changer Module R RR Roll plus Roll Rate RS Rear Spar RS Resolver RS Reserve RS Restoration RS Repeating Stroke R/S Rear Spar RSA Request for Service Allowance RSA Request for Support Allowance RSC Recording System Controlling RSE Roll Servo Engaged RSL Rudder Stop Limiter RSP Responder Beacon RSP Rotational Sampling Program RSPL Recommended Spare Parts List RSR Route Surveillance Radar RSRV Reserve RSS Rear Spar Station RSS Root Sum Square RS STA Rear Spar Station RSSW Right Strut Switch RST Reset RSU Raster Shading Unit RSV Reserve RSVD Reserved RSVR Reservoir RSVR Resolver RT Receiver-Transmitter RT Right RT Right Turn RT Route RT Rate RT Rejection Tag RT Round Trip R/T Receiver-Transmitter R/T Rate of Turn R/T Radio Transmit R/T Reverse Thrust RTA Receiver Transmitter Arinc RTA Required Time of Arrival RTC Real Time Clock RTC Reduced Temperature Configuration RTCA Radio Technical Commission for Aeronautics

40 REV. OCT. 00


RTE Route RTF Radio Telephony RTG Rating RTG1 Rating (engine) 1 RTG2 Rating (engine) 2 RTK Revenue Ton Kilometer RTL Reverse Thrust Lever RTL Reverse Thrust Limit RTL Reverse Thrust Limiter RTL Rental Tool RTL Ready To Load RTN Return RTNR Retainer RTO Rejected Takeoff, Refused Takeoff RTP Right Top Plug RTP Radio Tuning Panel RTRN Return RTRSW Rotary Switch RTRY Rotary RTS Return To Seat RTS Return To Service RTV Room Temperature Vulcanizing RUC Recommended Use Code RUD Rudder RUD STA Rudder Station RUE Repeat Update Excessive RV Rollout Valid RV Relief Valve RVA Reverser Actuator RVDT Rotary Variable Differential Transformer RVDT Rotary Variable Differential Transducer RVE Repeat Velocity Excessive RVR Runway Visual Range RVS Reverse, Reverser RVSM Reduced Vertical Separation Minimum RVSN Reversion RVSR Reverser RVT Rivet RW Right Wing RW Runway R/W Read/Write RWD Right Wing Down RWI Read/Write Interface RW/ILS Runway ILS RWK Rework R/W MEM RAM Memory RWS Right Wing Station RWY Runway RZ Return-to-Zero

S South S Second S Secondary S Minimum Slat Retract Speed (EFIS) S Stringer SA Single Aisle SAARU Secondary Attitude Air Data Reference Unit SAC Single Annular Combuster SACO Seattle Aircraft Certification Office (FAA) SAE Society of Automotive Engineers SAETG Structural Audit Evaluation Task Group SAF Safety SAFD Safetied SAI Standby Attitude Indicator SAL Salvage SALS Short Approach Light System SALV Salvage SAM Stabilizer Trim & Aileron Lockout Module (767) SAM Stabilizer/Elevator Asymmetry Module (757) SAP Special Audio Panel SAS Stabilization Augmentation System SAT Static Air Temperature SAT Saturate SATCOM Satellite Communication SAV Starter Air Valve SB Service Bulletin SB Switch Box SB Side Band S/B Speed Brake SBE Service Bulletin Engineering S/BELT Seat Belt SBEW Standard Basic Empty Weight SBHM Static Balance Hinge Moment SBL Symbol SBT Service Bulletin Telex SC Single Chime SC Scale SC Status Change SC Speed Control Computer SC Stock Code (Sonic) S/C Speed Command S/C Step Climb SCAV Scavenge, Scavenger SCC System Control Center SCC Station Control Card SCC Signal Consolidation Card SCC Stress Corrosion Cracking SCD Specification Control Drawing SCD Subject to Captains Discretion SCE Source SCF Standard Cubic Foot SCFM Standard Cubic Feet per Minute SCFS Standard Cubic Feet per Second SCH Schematic SCH Schedule SCH Search SCHED Schedule SCHEM Schematic SCID Signal Collection/Tail ID Card SCM Spoiler Control Module SCN Specification Change Notice SCO Section Control SCO Section Controller SCP Spoiler Control Package SCP Stabilizer Chord Plane SCP System Cargo Panel SCR Silicon Controlled Rectifier SCR Screw

41 REV. OCT. 00


SCR Specification Change Request SCRN Screen SCS Speed Command System SCS Speed Control System SCS Single Channel Simplex SCSV Speed Control System Valid SCT Status Change Telex SCT Supersonic Commercial Transport SCU Seat Control Unit SCU Start Control Unit SCU Signal Conditioner Unit SCU Supplemental Control Unit SCU Starter Converter Unit SCUP Scupper SCV Surge Control Valve SD System Display SD Shutdown (engine) SD Side Display S/D Step Descent S/D Shutdown S/D Stock Depleted SDAC System Data Analog Converter SDAU Special Data Acquisition Unit SDD System Description Document SDF Standard Data File SDI Source/Destination Identifier SDI Source Data Identifier SDL Software Data Loader SDM Speaker Drive Module SDN System Description Note SDP System Display Panel SDR Service Difficulty Report SDS Shop Distribution Standards SDTM Structure Description Training Manual SDU Satellite Data Unit SE Special Equipment (tool) SEB Seat Electronic Box SEB/ST Seat Electronics Box with Self Test SEC Seconds SEC Secondary SEC Section SEC Secant SEC Service Extender Concentrate (oil filter) SEC-FT Second-Foot SECT Section SEG Segment SEI Standby Engine Indicator SEI Standby Engine Instrument SEL Select, Selected, Selection SEL Selector SELCAL Selective Calling SELCAL Selective Call System SEL FROM Selected From SEL PNL Selector Panel SELTR Selector SEM Short Edge Margin SEM Scanning Electron Microscope SEN Sensor SENS Sensitivity SENS Sense SEPC Secondary External Power Contactor SEQ Sequence SER Service SER Serial SERNO Serial Number SER/PRL Serial to Parallel SERV Service SERV INT Service Interphone

SERVO Servomechanism SERVO CTL Servo Control SEU Seat Electronics Unit SF Spot Face S/F Spot Face SFAR Special Federal Aviation Regulation (FAA) SFC Specific Fuel Consumption SFCC Slat/Flap Control Computer SFCC Sideways Facing Crew Cockpit SFCC Sideways Facing Crew Configuration SFD Source-to-Film Distance SFE Seller Furnished Equipment SFENA Societe Francaise D'Equipments Pour La Navigation Aerienne SFM Surface Feet per Minute SFPI Slat/Flap Position Indicator SFPM Surface Feet Per Minute SG Symbol Generator SG Signal Generator SG Stroke Generator SG Strain Gauge SGML Standard Generalized Markup Language SGP Stroke Generator Processor SGSEL Suggested Ground Support Equipment List SGU Symbol Generator Unit SH Sheet S/H Sample and Hold SH ABS Shock Absorber SHDBL Sheddable SHED Shedding SHF Super High Frequency SHI Standby Horizon Indicator SHK Shank SHKR Shaker SHLD Shield SHLD Shielding SHN Scratch Hardness Number SHP Shaft Horsepower SHPR Shipper SHPT Shipment SHP TO Shipped To (Sonic) SHRD Shroud SHT Short SHT Sheet SHTW Short Word SHVR Shaver SI Slip Indicator SID Standard Instrument Departure SIDS Standard Instrument Departures SIDS Standard Instrument Departure Sequence SIF Selective Identification Feature SIG Signal SIIA Structural Item Interim Advisory SIL Service Information Letter SIL Silence SIL Systems Integrated Lab SIM Simulation SIM System Interface Module SIN Sine SIP Service Interphone SIR Service Information Release SIRS Significant Item Reporting System SIS Service Interphone System SIS Service Item Summary SISP Source Input Select Panel SIT Situation SIV Standard Item Variations SKED Schedule

42 REV. OCT. 00


SKT Socket SL Service Letter SL Sea Level SL Slat S/L Service Letter SLAMMR Side-Looking Airborne Modular Multimission Radar SLAR Side-Looking Airborne Radar SLAT STA Slat Station SLCTD Selected SLCTR Selector SLFPM Sea Level Feet Per Minute SLI Since Last Inspection SLP Space Limited Payload SLS Side Lobe Suppression SLS Sea Level Static SL SB Slat Switch Box SLST Sea Level Static Thrust SLT Slat SLV Sleeve SM Splice SMA Stress Methods and Allowables SMC Stall Management Computer SMD Surface Mounted Device SME Shipping Mechanical Equipment (tool) SMHGA Side Mounted High Gain Antenna SMK Smoke SMM Stall Margin Mode SMPG Structural Maintenance Planning Guidelines SMV Speed Mode Valid SMV Speedbrake Mode Valve SMYD Stall Management Yaw Damper SMYDC Stall Management Yaw Damper Computer SN Serial Number SN Sign S/N Serial Number SNGL Single SNIF Sensitivity for Normal Interface SNR Signal-to-Noise Ratio SNS Standby Navigation System SNS Sensor SNSR Sensor SO Shut-Off SO Second Officer S/O Shut-Off S/O Second Officer SOB Side-Of-Body SOC Start OF Climb SOH Start Of Heading SOL Solenoid SOL V Solenoid Valve SONIC Spares Ordering Nonstop Inventory Control SOP Standard Operating Procedure SOP Service Operating Procedure SOP Standard Option Pin SOP Standard Overhaul Practices SOSP Structures Operator Support Program SOT Start Of Transmission SOTM System Operation Training Manual SOV Shutoff Valve SOW Statement Of Work SP Splice SP Scratch Pad SP Summing Point SP Speed SP Sampling SP Space SP Stop

SP Special Performance SPAD Scratch Pad SPASE Single Point Audio System Earth SPBK Speed Brake SPC Statistical Process Control SPD Speed SPD Surfaces Position Digitizer SPD BK Speed Brake SPDBRK Speed Brake SPD/M Speed/Mach SPDT Single Pole Double Throw SPE Seller Purchased Equipment SPEC Specification SPF Specific Pathogen Free SPFK Specific SPG Spring SP GR Specific Gravity SP HT Specific Heat SPI Surface Position Indicator SPI Special Position Identification SPKR Speaker SPKRS Speakers SPL Spoiler SPL Splice SPL Splice List SPLC Splice SPLR Spoiler SPLY Supply SPM Stabilizer Position Module SPM Surface Position Monitor SPMC Service Process Material Control SPNC Single Pole Normally Closed SPNO Single Pole Normally Open SPOP Service Process Operation Procedure SPR Servo Pressure Regulator SPR Service and Performance Report SPR Suppression SPRC Safety Performance Review Committee SPRS Suppression SPS Service Process Solution SPS Single Point Sensor SPS Standard Positioning Service (GPS) SPST Single Pole Single Throw SPT Static Procedures Trainer SPU Start Power Unit SQ Square SQ Squelch SQ CM Square Centimeter SQ FT Square Feet SQ-FT Square-Feet SQ IN Square Inch SQ KM Square Kilometer SQL Squelch SQ M Square Meter SQ MI Square Mile SQ MM Square Millimeter SQ u Square Micron SQW Square Wave SQ YD Square Yard SR Senior SR Spherical Radius SRA Specific Range Air SRAM Static Random Access Memory SRCH Search SRD Software Requirements Document SRE Surveillance Radar Element of GCA SRF Solvent Resistant Finish SRF Self Relieving Filter

43 REV. OCT. 00


SRKM Structural Repair Kit Manual SRL Significant Rework Log SRM Structural Repair Manual SRM Stabilizer Trim/Rudder Ratio Module SRP Service Related Problem SRS Speed Reference System SRU Shop Repairable Unit SRU Shop Replaceable Unit SRV Servicing SRVO Servo SS Single Shot SS Slow Slew SS Stick Shaker SS Slat Station SS Stainless Steel SS Suggested Spare SS Sky/Shading SSALS Simplified Short Approach Light System SSALSR Simplified Short Approach Light System Runway Alignment Lights SSB Split System Breaker SSB Single Side Band SSB Supplier Service Bulletin SSB System Startup Box SSC Static Source Correction SSC Single Stroke Chime SSCVR Solid State Cockpit Voice Recorder SSD Significant Structural Detail SSD Source Select Discrete SSEC Static Source Error Correction SSFD Signal Selection Fault Detection SSFDR Solid State Flight Data Recorder SSG Single Stroke Gong SSI Structural Significant Item SSI Supplemental Structural Inspection SSI Stocked Specialty Item SSID Supplemental Structural Inspection Document SSIP Supplemental Structural Inspection Program SSIS Significant Service Item Summary SSLCV Synch Shaft Lock Control Valve SSM Servo System Monitor SSM Sign Status Matrix SSM System Schematics Manual SS M Slow Slew, Month (clock) SSPL Structural Spare Parts List SSR Secondary Surveillance Radar SSR Solid State Relay SSSV Solid State Stored Voice SST Supersonic Transport SSW Strut Switch SSWP Signal Swap ST Start ST Standard Tool ST Status Code (Sonic) STA Station STA Stationary STA Straight-in-Approach STA Stabilizer Trim Actuator STAB Stabilizer STAB Stabilized STAB Stabilization STAB BL Stabilizer Buttock Line STAB STA Stabilizer Station STAN Stanchion STAR Standard Terminal Arrival Route STAT Status STAT Static STAT Statistic

STB Boeing Part Standards STBD Starboard STBY Standby STC Sensitivity Time Control STC Servo Test Complete STC Supplemental Type Certificate (FAA) STCM Stabilizer Trim Control Module STD Standard STE System Test Equipment STE Special Test Equipment STFS Structures Task Forces STG Structures Task Group STGR Stringer STIF Stiffener STIFF Stiffener STIM Stimulus ST INV Static Inverter STIU Stabilizer Trim Interface Unit STL Steel STLM Stabilizer Trim Limit Switch STL WARN Stall Warning STOL Short Takeoff and Landing STOM System Operation Training Manual STP Step STP Surge Tank Protection STP Stamp STR Stringer STR Structural STRG Steering STRL Structural STRN Straighten STRUCT Structure STS Status, System Status STS Speed Trim System STVC Standby Temperature Control Valve STWL Stairwell STWY Stairway STX Data To Follow SU Switching Unit SUBASSY Subassembly SUBCONT Subcontract, Subcontractor SUBJ Subject SUBMUX Submultiplexer SUBS Subsequent SUD Stretched Upper Deck SUFF Suffix SUM Summing SUP Supply SUP Support SUPL Supply SUP-NUM Supernumerary SUPP Supplemental SUPPL Supplement, Supplemental SUPPR Suppressor SUPPR Suppression SUPSD Superseded SUPSD BY Superseded By SUPT Support SUR Surge SUR Surface SURF Surface SURV Surveillance SV Solenoid Valve SV Servo Valve SV Servicing SVA Stator Vane Actuator SVA Stator Vane Angle SVC Service

44 REV. OCT. 00


SVCE Service SVD Seat Video Display SVMTR Servomotor SVO Servo SVS Vertical Speed Sync SVU Seat Video Unit SW Switch S/W Software SWC Stall Warning Computer SWG Switching SWG Structures Working Group SWITCH IN Switch Input SWL Sidewall SWLT Switchlight SW/LT Switch-Light SWMC Stall Warning Management Computer SWP Sweep SWR Standing Wave Ratio SWS Switches SWS Software Sales SWTG Switching SWY Stopway SYM Symmetrical SYM Symbol SYM GEN Symbol Generator SYN Synchronize SYN Synthetic SYN Synchro SYNC Synchro SYNC Synchronize, Synchronous SYNC Synchronization SYN/DIG Synchronous Digital SYN REF Synchro Reference SYNTH Synthesizer SYNTHR Synthesizer SYS System SYST System

T True T Turn T Time T Temperature T2 Inlet Total Temperature T2 Fan Inlet Temperature T2C HP Compressor Inlet Temperature T4.95 Turbine Exhaust Temperature T54 Low Pressure Turbine Inlet Temperature TA Twin Aisle TA Trim Assembly TA Trim Augmentation TA Traffic Advisory TA Taxi (out) TAB Test and Bite Panel TAB Tabulate, Tabulation TAC Trim Augmentation Computer TAC Tactical TAC Thrust Asymmetry Compensation TACAN Tactical Air Navigation TACH Tachometer TACT Tactical TAD Telegraphic Airworthiness Directive TAES Transport Airplane and Engine Subcommittee TAFCU Timed Acceleration Fuel Control Unit TAI Thermal Anti-Ice TAN Tangent TAN Total Acid Number TAP Total Air Pressure TA PM Trim Augmentation Power Monitor TAR Terminal Area Surveillance Radar TAS True Airspeed TAS V True Airspeed Valid TAT Total Air Temperature TB Terminal Block TB Tie Breaker TBA To Be Announced TBB Transfer Bus Breaker TBC The Boeing Company TBD To Be Determined TBDP Tie Bus Differential Protection TBE Tetrabromoethane TBF To Be Furnished TBO Time Between Overhaul TBSV Time Between Scheduled Visits TBU Time Base Unit TBV Turbine Bypass Valve TBV Transient Bleed Valve TC Test Complete TC Thermocouple TC Turn Coordination TC Turbine Case TC Time Constant TC Type Certificate (FAA) T/C Top of Climb T/C Thermocouple T/C Turbo Compressor TC1 Turbine Cooling Air TCA Turbine Cooling Air TCA Terminal Control Area TCAS Traffic Alert and Collision Avoidance System TCAS Traffic Collision and Avoidance System TCC Thrust Control Computer TCC Turbine Case Cooling TCC Turbine Clearance Control TCCA Turbine Clearance Control Air TCCS Thrust Control Computer System TCCV Turbine Clearance Control Valve

45 REV. OCT. 00


TCF Trim, Centering and Feel Unit TCF Terrain Clearance Floor TCFN Two's Complement Fractional Notation TCL Turn Coordinator Left TCM Technical Coordination Meeting TCPS Temperature Compensated Pressure Switch TCTO Time Compliance Technical Order TCV Temperature Control Valve TD Time Delay TD Technical Directive TD Turbine Driven TD Touch Down TD Test Data T/D Top of Descent T/D Time Delay T/D Time/Distance T*D Top of Descent TDA Trim Down Arm TDC Trim Down Control TDC Time Delay Closing TDL Time Delay Logic TDM Tooling Design Manual TDO Time Delay Opening TDP Touch Down Protection TDP Touchdown Point TDR Torque Differential Receiver TDR Time Domain Reflectometer TDU Time Display Unit TDX Torque Differential Transmitter TDY Temporary Duty TDZL Touchdown Zone Lights TE Trailing Edge TE Turbulence Engaged TE Test Equipment TE HP Stage Air Temperature T/E Trailing Edge TE ANN Turbulence Engaged Annunciation TEC Turbine Exhaust Case TEC Turbine Exhaust Cone TECH Technical TEL Telephone TEL Trailing Edge Left TELE Telephone TEM Temperature TEMP Temperature TEMP Test and Evaluation Master Plan TENS Tension TEO Engine Oil Temperature TER Trailing Edge Right TERM Terminal TERMN Termination TEST SIG Test Signal TF Fan (air) Temperature T/F Track of a Fixed waypoint TFC Traffic TFE Teflon TFR Transfer TFR Technical Focus Reports TFU Transient Fuel Unit TFU Technical Follow Up TFV Transient Fuel Valve TG Tail Gear TGB Transfer Gearbox TGL Touch-and-Go Landing TGT Turbine Gas Temperature TGT Target TH True Heading THD Thread

THEO Theoretical THEOD Theodolite THERM Thermal THERM Thermometer THERMO Thermostat THETA Temperature and Pressure THK Think THMS Thermistor T/HOLD Throttle Hold THP Thrust Horsepower THR Thrust THR Throttle THR HLD Throttle Hold THR HOLD Throttle Hold THRM Thermal THR MGT Thrust Management THROT Throttle THR REF Thrust Reference THR REV Thrust Reverser THRSH Threshold THRST Thrust THRU Through THS Trim Horizontal Stabilizer THSHD Threshold TI Texas Instruments TI Track to an Interrupt TI Taxi In TI Transported Interface Ti Titanium TIA Type Inspection Authorization TIE Bus Tie TIM Time TIP Tune In Progress TIR Type Inspection Report TIS Time In Service TIT Turbine Inlet Temperature TK Track TK Track Angle TK Turn Knob TK Tank T/K Turn Knob TKE Track Angle Error TKE Track Error TKID Turn Knob In Detent TKS Thanks TL Tilt TL Transmittal Letter TLA Throttle Lever Angle TLA Thrust Lever Angle TLB Technical Log Book TLM Telemeter TLR Thrust Lever Resolver TLSE Terminal Lug Sensing Elements TLT Thrust Lever Travel TLW Tail Wind TM Thrust Management TM Torque Motor TM Manifold Temperature TMA Thrust Mode Annunciator TMC Thrust Management Computer TMCF Thrust Management Computing Function TMCS Thrust Management Computer System TME Thrust Management Engaged TME Transportable Mechanical Equipment (tool) TMF Turbine Mid-Frame TMF Thrust Management Function TMG Timing TMIGA Top-Mounted Intermediate Gain Antenna

46 REV. OCT. 00


TMP Temperature TMR Timer TMS Thrust Management System TMS Thrust Management Select TMSP Thrust Mode Select Panel TO Takeoff TO Turn-Off TO Technical Order To Total Inlet Temperature T/O Take-Off TO/APPR Take-Off/Approach TOBI Tangential On Board Injection TOC Top Of Climb TOCWS Takeoff Configuration Warning System TOD Top of Descent TOD Take-Off Dry TOD Take-Off Distance TOD Task Oriented Data TOE Takeoff Engaged TOE ANN Takeoff Engaged Annunciation TOGA Take-Off Go Around TO/GA Takeoff Go-Around TOGW Take-Off Gross Weight TOL Tolerance TOP Takeoff Power TOR Take-Off Run TOR Torque TORQ Torque TOS Turbine Overspeed TOSC Turn On Self Check TOT Total TOW Take-Off Weight TOW Take-Off Wet TP Test Point TP Thrust Select Panel TP True Position TP Top Plug TP Tangent Point TP Type (WDM) T-P Turn Point TPIS Tire Pressure Indication System TPMU Tire Pressure Monitor Unit TP&P Technical Policies and Procedures TPR Transponder TPRSOS Trim Air Pressure Regulating and Shutoff Valve TPU Transient Pressure Unit TPU Transient Power Unit TR Transformer Rectifier TR Thrust Reverser TR Temporary Revision TR Truss TR Turn Radius TR Transistor TR Regulated Temperature TR Torque Receiver TR Transit (check) T/R Transformer Rectifier T/R Thrust Reverser T/R Transmit-Receive T/R Thrust Beam T-R Transmitter-Receiver T-R Transformer-Rectifier TRA Thrust Resolver Angle TRA Throttle Resolver Angle TRACON Terminal Radar Control TRAJ Trajectory TRAN Transfer TRANS Transit, Transition

TRANS Transfer TRANS Transformer TRANS Transient Control TRANS Transport TRANSF Transfer TRANSF Transformer TRANSV Transverse TRC Thrust Rating Computer TRC Thermatic Rotor Control TRDE Trade TRF Transfer TRF Turbine Rear Frame TRF Tuned Radio Frequency TRI Triple TRIG Trigger TRIM V Trim System Valid TRK Truck TRK Track TRNBKL Turnbuckle TROPO Tropopause TRP Thrust Rating Panel TRPL Triple TRQ Torque TRQR Torquer TRS Transformer Rectifiers TRS Technical Repercussion Sheet TRSM Thrust Reverser Sequencing Mechanism TRT Turn Round Time TRU Transformer Rectifier Unit TRU True TRUN Trunnion TRV Travel TRWL Thrust Reverser Water Line TS Terminal Strip TS Trouble Shooting TS Temperature Switch TS Tensile Strength TS Test Set T/S Terminal Strip TSA Test Set Airplane TSC Troubleshooting Chart TSC Torque Signal Conditioner TSFC Thrust Specific Fuel Consumption TSJ Test Jig TSL Terminal Strip List TSLSV Time Since Last Shop Visit TSM Trouble Shooting Manual TSO Time Since Overhaul TSO Technical Service Order TSO Technical Standard Order (FAA) TSS Test Set Station TST Test TSTR Transistor TT Total Time TT Total Temperature TT Term Type TT Switching Temperature of HP Valve TT Tool Tag TT Terminal Type TT2 Engine Inlet Temperature TTG Time To Go TTL Transistor Transistor Logic TTL Total TTL Tuned To Localizer TTR Technical Trouble Report TTU Through Transmission Ultrasonic TUA Trim Up Arm TUC Trim Up Control

47 REV. OCT. 00


TUN Tuning TUNE Tuner TURB Turbulence TURB Turbine TURBL Turbulence, Turbulent TV Television TVB Turbine Bypass Valve TVBA Turbine Vane and Blade Cooling Air TVBC Turbine Vane and Blade Cooling TVBCA Turbine Vane and Blade Cooling Air TVC Turbine Vane Cooling TVOR Terminal VOR TW Twisted T/W Together With (IPC) T/WIND Tail Wind TWR Tower TWS Technical Work Statement TWT Traveling Wave Tube TWX Teletype Written Exchange TWY Taxiway TX Transmitter TX Torque Transmitter TXPDR Transponder TY Type (WDM) TYP Typical TZ Tin-Zinc

u Micro UA Unit Assembly UAC Upper Area Control Center UARRSI Universal Aerial Refueling Receptacle System Installation UART Universal Asynchronous Receiver Transmitter UART Universal Asynchronous Receive/Transmit UB Utility Bus UB Unit Bond UBR Utility Bus Relay UC Upper Center UCM Uncommanded Movement UCT Universal Coordinated Time U/D Upper Deck UDC Upper Deck Cargo UDL Unit Detail Listing UDT Update UF Under Frequency UFDR Universal Flight Data Recorder U/FLOOR Underfloor UHF Ultra High Frequency UI Unit Issue UKCAA British Civil Aviation Authority ULB Underwater Locator Beacon ULC Universal Logic Card ULD Unit Load Device ULD Underwater Locating Device UM Unit Manufacture UM Unit of Measure (Sonic) UMC Universal Master Caution UNBAL Unbalance UNCPLG Uncoupling UNCRCTD Uncorrected UND Under UNIV Universal UNK Unknown UNLK Unlock UNLKD Unlocked UNP Unknown from Production surplus UNREG Unregulated UNRGLTD Unregulated UNSCHD Unscheduled UNSCHED Unscheduled UNSD Unused UNSHD Unscheduled U/O Used On UP Upper UPDT Update UP/LT Up Left UPR Upper UR Utilization Rate UR Unsatisfactory Report URR Unscheduled Removal Rate US Under Speed US United States U/S Unserviceable USB Upper Side Band uSEC Microsecond USG U.S. Gallons USG Unusually Significant (service bulletin) USPHS U.S. Public Health Service UT Unit Time UTC Coordinated Universal Time UTIL Utility UUT Unit Under Test UV Under Voltage UV Ultra-Violet UVEROM Ultra Violet Erasable Read Only Memory

48 REV. OCT. 00


UV PROM Ultra Violet Programmable Read Only Memory UWY Upper Airway

V Volt, Voltage V Valve V Velocity V Version V Violet V Voice V Vendor V1 Takeoff Decision Speed V1 Critical Engine Failure Speed V2 Scheduled Target Speed V2 Takeoff Safety Speed V2min Minimum Takeoff Safety Speed V3 Flap Retraction Speed V4 Slat Retraction Speed Va Design Maneuvering Speed VA Volts-Amperes VA Heading with an Altitude Termination VAC Volts Alternating Current VAC Vacuum V AC Volts Alternating Current VAL Valve VALU Value VAP Visual Approach Procedure VAR Variation, Variable VAR Reactive Volt Ampere VAR Visual-Aural Radio Range VAR/WX Variable Weather (mode) VASIS Visual Approach Slope Indicator System VB Design Speed for Maximum Gust Intensity VB Vertical Bearing V/B Vertical Beam VBFLO Initial Buffet Onset Speed (low) VBS Vertical Beam Sensor VBV Variable (bleed) Bypass Valve VBV Variable Bleed Valve VBVS Variable (bleed) Bypass Valves Vc Calibrated Airspeed VC Design Cruising Speed VC Variable Camber V/C Vendor Code VCD Vortex Control Device VCDU Video Control Distribution Unit VCE Voice VCO Voltage Controlled Oscillator VCP Video Control Panel VD Design Diving Speed VD VOR/DME VD Heading to a DME Distance VDC Volts Direct Current V DC Volts Direct Current VDCU Video Distribution Control Unit VDCU Video Display Control Unit VDD Version Description Drawing VDEV Vertical Deviation VDF VHF Direction Finding Station VDR VHF Data Radio VDU Video Distribution Unit VE Velocity East VEF Critical Engine Failure Speed VEH Vehicle VEL Velocity VEND Vendor VENT Ventilate, Ventilation VEP Video Entertainment Player VERT Vertical VERT ACC Vertical Acceleration VERT REV Vertical Revise VERT SPD Vertical Speed

49 REV. OCT. 00


VES Video Entertainment System VF Design Flap Speed VF Video Frequency VFE Maximum Flap Extended Speed VFR Visual Flight Rules VFTO Final Take Off Velocity VFTO Final Take Off Speed VFY Verify VG Vertical Gyro VGH Velocity-Gravity-Height VGH Vertical Gust History VGV Vertical Gyro Valid VH Maximum Speed in Level Flight with Maximum Continuous Power VHF Very High Frequency VHS Video Helical Scan VHV Very High Voltage VI Heading to an Intercept VIB Vibration VIB Initial Buffet Velocity VID Video VIGV Variable Inlet Guide Vanes VIO Violet VIP Very Important Person VIS Visual VIU Video Interface Unit V/L VOR/Localizer VL CAPT VOR/LOC Capture VLCT Very Large Commercial Transport VLD Valid VLE Landing Gear Extended Speed VLF Very Low Frequency VLLDC Very Low Level DC Voltage VLMTRC Volumetric VLO Landing Gear Operating Speed VLOF Lift-off Speed VLTGE Voltage VLV Valve VM Maneuvering Speed VM Heading with a Manual Termination Vm Minimum recommended Maneuvering Speed Vmax Maximum Operating Speed VMBE Maximum Brake Energy Speed VMC Minimum Control Speed (with one engine inoperative) VMC Visual Meteorogical Conditions VMCA Minimum Control Airspeed VMCG Minimum Control Ground Speed V MIN Minimum Operating Speed VMO Maximum Operating Velocity VMOMMO Maximum Operating Limit Speed VMS Minimum Selectable Speed VMU Minimum Unstick Speed VMU Video Monitor Unit VMU Video Modulator Unit VNAV Vertical Navigation V NAV Vertical Navigation V/NAV Vertical Navigation VNE Never-Exceed Speed VNE Vertical Nav Engaged VNS Vertical Nav Select VNV Vertical Nav Valid VO Voice VOL Volume VOLT Voltage VOM Volt Ohm Meter VOR VHF Omnidirectional Range VOR VHF Omnirange Station

VOR.D VOR.DME VORE VOR Engaged VOR LOC VOR Localizer VOR/LOC VOR/Localizer VORTAC VOR and TACAN Co-Located VOT Voter VOX Voice V-PATH Vertical Path VPI Vertical Path Integrator VPI Vapor Phase Inhibitor VPLC Valve Position Logic Card Vr Rotation Speed VR Voltage Regulator VR Voice Recorder V/R Voltage Regulator V REF Landing Reference Speed VREF Reference Speed VR-HDG Heading to a Radial VRMS Volts Root Mean Square VRTA Vertical Acceleration VS Vertical Speed VS Verses Vs Stall Speed V/S Vertical Speed VS1 Minimum Steady Flight Speed obtained in a Specified Configuration VSBN Vendor Service Bulletin Number VSBT Vendor Service Bulletin Title VSCF Variable Speed Constant Frequency VSCU Video System Control Unit VSD Vertical Situation Display VSE Vertical Speed Engaged VSEL Selected-Approach Speed (autothrottle VSI Vertical Speed Indicator VSMF Visual Search Microfilm Files VSO Volumetric Shut Off VSO Minimum Steady Flight Speed in the Landing Configuration V-SPD Vertical Speed VSS Stick Shaker Speed VSS Vertical Speed Select V/STOL Vertical/Short Takeoff and Landing VSV Variable Stator Vane VSVS Variable Stator Vanes VSWR Voltage Standing Wave Ratio VTK Vertical Track VTK Vertical Track Error VTO Volumetric Top Off VTO Vertical Takeoff VTOL Vertical Takeoff and Landing VTR Video Tape Reproducer VTR Video Tape Recorder VTR Variable Takeoff Rating VTVM Vacuum Tube Voltmeter VTY Vanity VX Speed of Best Angle of Climb VY Speed for Best Rate of Climb

50 REV. OCT. 00


W West W White W Wing W Watts W Weight W Wire W Width W Warm WA Wind Angle W/A Wraparound WACS Warning And Caution System WAF Wafer WARN Warning WAY PT Waypoint W/B Wire Bundle WBA Wire Bundle Assembly WBC Weight and Balance Computer WBL Wing Buttock Line WBM Weight and Balance Manual WBRR Wire Bundle Revision Report WBS Weight and Balance System WBS Work Breakdown Structure WC Wording Change W/CHAIR Wheelchair WCP Wing Chord Plane WCS Wing Center Station WCU Waste Control Unit WD Wind Direction WD Word WD Warning Display WD Wing Datum WD Wheels Down W/D Wiring Diagram WDI Wind Direction Indicator WDIR Wind Direction WDM Wiring Diagram Manual WDO Window WDO HT Window Heat WEA Weather WEA RDR Weather Radar WEM Warning Electronics Module WES Warning Electronics System WEU Warning Electronics Unit WFC Widespread Fatigue Cracking WG Wing WG Wave Guide WG Working Group WGAP Word Gap WGD Windshield Guidance Display WGDC Windshield Guidance Display Computer WGDS Windshield Guidance Display System WG SW Wave Guide Switch WGT Weight WH Wheel WH Watt-hour WHCU Window Heat Control Unit WHCU-L Window Heat Control Unit-Left WHCU-R Window Heat Control Unit-Right WHL Wheel WHLS Wheels WHT White WIRC Warning-Inhibition-Recall-Clear WIU Wiring Integration Unit WIU Wheel Interface Unit WL Water Line WLDP Warning Light Display Panel WLG Wing Landing Gear WLP Weight Limited Payload

WM Wiring Diagram Manual WM Wattmeter WMBPV Windmill Bypass Valve WND Wind WNDSHR Windshear WO Washout W/O Washout W/O Without WOR Wear Out Rate WOW Weight On Wheels WP Waypoint WPT Waypoint WR Weather Radar WR Write WR Word Rate W/R Weather Radar WRN Warn, Warning WRL Wing Reference Line WRP Wing Reference Plane WRS Wire Release System WS Wind Speed WS Wing Station WS Wind Shear W/S Wind Shield W/S Wind Shear W/S Will Ship WSC Windshear Computer WSCP Warning and System Control Panel WSDP Warning and System Display WSHLD Wind Shield WSPD Wind Speed WSS Wing Spar Station WSSG Warning System Symbol Generator WSTA Wing Station W STA Wing Station WT Weight W/T Wing Tip WTAI Wing Thermal Anti Ice WTAIS Wing Thermal Anti-Ice System WTB Wing Tip Brake WTC Wire Type Code WTG Waiting WTR Water WTS Wing Tip Station WU Wheels Up WUC Work Unit Cost W/V Wind Direction Speed WW Wheel Well W/W Wheel Well WX Weather WX Weather Radar WXR Weather Radar WX+T Weather Turbulence (mode) WYPT Waypoint

51 REV. OCT. 00


X Cross XARM Cross Arm XBAR Crossbar X-BLD Cross Bleed X-CH Cross Channel X-CHAN Cross Channel XCPN Exception XCVR Transceiver XDCR Transducer XDUCR Transducer XFD Cross Feed XFEED Cross Feed X FEED Cross Feed X-FEED Cross Feed XFER Transfer XFM Transformer XFMR Transformer XFR Transfer XLOC LOC Receiver Yaw Axis X LINE Crossline XLTR Translater XMISSION Transmission XMIT Transmit XMITTER Transmitter XMSN Transmission XMTG Transmitting XMTING Transmitting XMTR Transmitter XNT Transient XPC External Power Contactor XPDR Transponder XPNDR Transponder XREF Cross Reference XSECT Cross Section XSTR Transistor XTAL Crystal X-TALK Cross-Talk XTK Cross Track XTK Cross Track Distance XTK Cross Track Deviation XTK Cross Track Error XTKA Cross Track Acceleration XUL Hook-Up List X VALVE Cross Valve

Y Yellow Y Yaw YAW DMPR Yaw Damper YC Tourist Class YC Yaw Computer YCAM Yaw Camout YCF Economy Class-Front YCR Economy Class-Rear YD Yard Y/D Yaw Damper YD ACT Yaw Damper Actuator YDM Yaw Damper Module YDS Yaw Damper System YEL Yellow YES Yankee Escape System YINT Yaw Integrator YNFF Yaw No First Failure YR Year Y/RATE Yaw Rate YRG Yaw Rate Gyro YSSM Yaw Servo System Monitor YTOM Yaw Takeoff Mode Z Zulu Time (GMT) Z Impedance Z Zone ZDL Zone Division Logic ZFW Zero Fuel Weight ZIA Zone Integration Area ZIU Zone Integration Unit ZMU Zone Management Unit ZN Zone ZNI2 Zinc Iodide ZP Pressure Altitude ZPC Zone Power Converter ZPC Zone Power Controller Zpi Indicated Pressure Altitude ZR Zirconium ZRF Zero Fuel Weight ZTC Zone Temperature Controller

52 REV. OCT. 00

AIRCRAFT ABBREVIATIONS & ACRONYMS

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