737 Systems Schematics

29
Bleed Air System Schematic Boeing 737-300/400/500 Southeast Flight Support SFS R L 80 60 80 100 0 20 PSI R L 9th STAGE 5th STAGE STARTER ENGINE BLEED AIR VALVE BLEED TRIP SENSORS APU BLEED AIR VALVE BLEED AIR CONDITION: ENGINES OPERATING & SUPPLYING AIR CONDITIONING PACKS 737-400 1 1 BLEED AIR DUCT TO HYD RESERVE TO HYD RESERVE ISOLATION VALVE TO PACK VALVE WING TAI VALVE TO TURBOFAN TO WING TIA TURBOFAN VALVE STARTER VALVE HIGH STAGE VALVE COWL TAI TO ASP TAT PROBE DUCT PRESSURE TRANSMITTER EXTERNAL AIR CONNECTION FROM RIGHT ENGINE L RECIRC FAN R RECIRC FAN L PACK R PACK ISOLATION VALVE TRIP RESET S APU BLEED 1 2 OFF AUTO WING-BODY OVERHEAT WING-BODY OVERHEAT PACK TRIP OFF WING ANTI ICE WING ANTI ICE PACK TRIP OFF BLEED TRIP OFF BLEED TRIP OFF OFF ON OFF ON OFF AUTO OFF AUTO AUTO HIGH OFF AUTO HIGH OPEN CLOSE OVHT TEST R L 80 60 80 40 100 0 20 PSI R L

Transcript of 737 Systems Schematics

Page 1: 737 Systems Schematics

Bleed Air System Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

R

L 80

60

80

1000

20

PSI

R

L

9th STAGE

5th STAGE

STARTER

ENGINE BLEEDAIR VALVE

BLEED TRIPSENSORS

APU BLEEDAIR VALVE

BLEED AIR

CONDITION:ENGINES OPERATING &SUPPLYING AIRCONDITIONING PACKS

737-4001

1

BLEEDAIR DUCT

TO HYDRESERVE

TO HYDRESERVE

ISOLATIONVALVE

TO PACKVALVE

WING TAIVALVE

TO TURBOFAN

TO WING TIA

TURBOFANVALVE

STARTERVALVE

HIGH STAGEVALVE

COWLTAI

TO ASPTAT PROBE

DUCT PRESSURETRANSMITTER

EXTERNALAIR CONNECTION

FROM RIGHTENGINE

L RECIRC FAN R RECIRC FAN

L PACK R PACKISOLATIONVALVE

TRIP

RESET

S

APUBLEED

1 2

OFFAUTO

WING-BODYOVERHEAT

WING-BODYOVERHEAT

PACKTRIP OFF

WINGANTIICE

WINGANTIICE

PACKTRIP OFF

BLEEDTRIP OFF

BLEEDTRIP OFF

OFFON

OFFON

OFFAUTO

OFFAUTO

AUTO HIGH

OFFAUTOHIGH

OPEN

CLOSE

OVHT

TEST

R

L 80

60

80

40

1000

20

PSI

R

L

Page 2: 737 Systems Schematics

Wing-Body Overheat Ducts & Lights

Boeing 737-300/400/500 Southeast Flight SupportSFS

R

L

80

60

80

40

1000

20

PSI

R

L

R RECIRC FAN

L PACK R PACKISOLATIONVALVE

TRIP

RESET

APUBLEED

1 2

WING-BODYOVERHEAT

WING-BODYOVERHEAT

WING-BODYOVERHEAT

WING-BODYOVERHEAT

PACKTRIP OFF

WINGANTIICE

WINGANTIICE

PACKTRIP OFF

BLEEDTRIP OFF

BLEEDTRIP OFF

OFFON

OFFON

OFFAUTO

OFFAUTO

AUTO HIGH

OFFAUTOHIGH

OPEN

CLOSE

OVHT

TEST

1

L RECIRC FAN R RECIRC FAN

OFFAUTO

OFFAUTO

1

23

4

5

6

78

LEFT LIGHTSENSORS LOCATED:

1. LEFT ENGINE STRUT.

2. LEFT INBOARD WINGLEADING EDGE.

3. LEFT-HAND AIRCONDITIONING BAY

4. KEEL BEAM

5. BLEED DUCT FROM APU.

RIGHY LIGHTSENSORS LOCATED:

6. RIGHT ENGINE STRUT.

7. RIGHT INBOARD WINGLEADING EDGE.

8. RIGHT-HAND AIRCONDITIONING BAY

737-4001

R

L

80

60

80

40

1000

20

PSI

R

L

Page 3: 737 Systems Schematics

Air Conditioning Pack Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

R PACK

WING-BODYOVERHEAT

PACKTRIP OFF

OFFAUTOHIGH

WINGANTIICE

AIRCYCLE

MACHINE

WATERSEPARATOR

MIXINGCHAMBER

PASSCABIN

TO MIXMANIFOLD

RAMAIR

AUTO TEMPCONTROLLER

HOT AIRMIX VALVE

PACKVALVE

RIGHTBLEED AIR

BLEED AIR

COLD AIRMIX VALVE

CONDITIONED AIRCOLD AIR

HEAT EXCHANGERCOOLED AIR

BLEED AIR

AUTO

COOL WARM

COOL WARM

MANUAL

.

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Page 4: 737 Systems Schematics

WING-BODYOVERHEAT

PACKTRIP OFF

OFFAUTOHIGH

WINGANTIICE

R PACK

Air Conditioning Distribution Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

CONT CABIN AIR TEMP PASS CABIN

60

8040

20

0100

TEMP

COL D H O

T COL D H O

TDUCT

OVERHEATDUCT

OVERHEAT

SUPPLYDUCTAIR MIX

VALVEAIR MIXVALVE

PASSCABIN

. .

FILTER LEFT SIDEWALLRISER

RECIRCFAN

LEFT PACKTRIP OFF

RIGHT PACKTRIP OFF

RIGHTDUCTOVERHEAT

DRIVES MIX VALVESFULL COLD

TO RIGHT SIDEWALLRISER

LEFT DUCTOVERHEAT

FROM LEFT PACK FROM RIGHT PACK

MIXEDMANIFOLD

GROUND PRECONDITIONEDAIR SUPPLY

TO RIGHTPACKVALVE

CONDITIONED AIR

CONDITION:IN FLIGHT PACKS ON

.

.

..

...

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Page 5: 737 Systems Schematics

WING-BODYOVERHEAT

PACK

OFFAUTOHIGH

R PACK

WINGANTIICE

Air Conditioning Pack Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

WATERSEPARATOR

STBYPACKTEMPCONTVALVE

PACKTEMPCONTVALVE

RIGHTBLEEDAIR

BLEEDAIR

TO MIXMANIFOLD

RAMAIR

PACKVALVE

LEFTBLEEDAIR

TO TRIMAIR SYSTEM

CONDITIONED AIRCOLD AIR

HEAT EXCHANGERCOOLED AIR

BLEED AIR

AIRCYCLE

MACHINE

R ELECTRONICCONTROLLER

L ELECTRONICCONTROLLER

L PRIMARYPACK CONTROLL PRIMARY

PACK CONTROLR RAM

AIR CONTROLL RAMAIR CONTROL

L STBYPACK CONTROL

R STBYPACK CONTROL

....C W

....C W

0FF 0FF

CONT CABAUTO

FWD CABAUTO ....

C W0FF

AFT CABAUTO

..

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Page 6: 737 Systems Schematics

Air Conditioning Distribution Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

.

CONDITIONED AIRBLEED AIR

ELECTRICFANS

TRIM AIRMODULATING

VALVES

LPACK

RPACK

TRIM AIRPRESSUREREGULATOR& SHUTOFFVALVE

GROUNDPRECONDITIONED

AIR

TRIM AIR

CONT CAB FWD CAB AFT CAB

OFFON

L ELECTRONICCONTROLLER

AFT CABZONE TEMPCONTROL

BACK-UPFLIGHT DECKZONE TEMPCONTROL

R ELECTRONICCONTROLLER

FWD CABZONE TEMPCONTROL

PRIMARYFLIGHT DECKZONR TEMPCONTROL

ZONETEMP

ZONETEMP

ZONETEMP

MIXEDMANIFOLD

CONDITION:IN FLIGHT PACKS ON

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Page 7: 737 Systems Schematics

Cabin Pressure Control System Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

RECIRC FANOFF

AUTO

R RECIRC FANOFF

AUTO

FLT

GRD

AUTOFAIL

OFF SCHEDDESENT STANDBY MANUAL

CONDITIONED AIR FROM OVERHEADAND SIDEWALL OUTLETS

AIRPLANEALTIMETERSBARO SET

CABIN SENSEPORT

STATICPORTS

NEGATIVEPRESSURERELIEF

FORWARDOUTFLOWSENSOR

DC AC

AUTO TRANSFER TO STBY

ADC

CAPT F/O

MAIN OUTFLOWVALVE

PRESSURE RELIEFAT 8.65 PSI

AIR/GROUNDSAFTY SENSOR

737-400

CONDITION:IN FLIGHT NORMAL OPERATION

Page 8: 737 Systems Schematics

Anti-Ice Components Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

FLIGHT DECKWINDOWSWINDOW HEATWINDSHIELD WIPERSRAIN REPELENT

ELEVATOR PITOTPROBES (2 PLACES)

ANGLE AIRFLOW SENSOR(2 PLACES)

TEMPERATURE PROBE

PITOT STATIC PROBE(4 PLACES)

ENGINE COWL LIP LEADING EDGE SLATS

. ..

Page 9: 737 Systems Schematics

Engine Anti-Ice System Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

BLEED AIR

ENGINE COWLANTI-ICE (TAI)

ENGINEBLEED VALVE

HIGH STAGEVALVE

TOPNEUMATICSYSTEM

5 TH

9 THCOWLANTI-ICE VALVE

ENGANTI-ICE

1 2

OFFON

COWL VALVEOPEN

COWL VALVEOPEN

COWLANTI-ICE

COWLANTI-ICE

..

Page 10: 737 Systems Schematics

Wing Anti-Ice System Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

WING ANTI-ICEOFFON

L VALVEOPEN

R VALVEOPEN

BLEED AIR

THRUST

ABOVE T. O.WARNING

BELOW T. O.WARNING

RIGHT MAINLANDING GEAR

WING ANTI-ICECONTROL VALVELEADING EDGE SLATS

PNEUMATICMANIFOLD

HIGHTEMP

LOWTEMP

TELESCOPING DUCTWING DISTRIBUTION DUCT

THERMAL SWITCH GROUND

AIR

CONDITION:ON THE GROUND WINGANTI-ICE ON ENGINES ATIDLE THRUST DUCT TEMP LOW

..

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Page 11: 737 Systems Schematics

Electrical Power Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

RISE

GEN DRIVEOIL TEMP

ºC

IN160

30

2010

0 80 12040

RISE

GEN DRIVEOIL TEMP

ºC

IN160

30

2010

0 80 12040

STANDBY POWER

DRIVE TEMP

DISCONECT DISCONECT

LOW OILPRESSURE

LOW OILPRESSURE

HIGH OILPRESSURE

STANDBYPWR OFF

HIGH OILTEMP

DRIVE CAN BERECONNECTED

ONLY ONGRD

BAT OFF AUTO

RISE

IN

AMPERES

AC

50100

150

0 AMPERES

AC

50100

150

0

BUS TRANS

GEN 1 APU GEN GEN 2

GRDPWR

OFF

OFF

ON

ON

ON

OFF

OFF

AUTO

TRANSFERBUS OFF

TRANSFERBUS OFF

BUSOFF

BUSOFF

GEN OFFBUS

GEN OFFBUS

APU GENOFF BUS

GRD POWERAVAILABLE

EXTERNAL AC BUS

GENERATOR BUS 1

TR 1 TR 2

GEN APU

INW

115v AC GNDSERVICE BUS

GENERATORDRIVE &STANDBYPOWER PANEL

GND SERVICERELAY

NORMAL

APU START

NORMALALTERNATE ALTERNATETRANSFERRELAY 1

TRANSFERRELAY 2

TR3DISCONNECT

RELAY

BUSSWITCHING

115v AC GNDMAIN BUS 1

115v AC TRANSFERBUS 1

AC STANDBY BUS DC STANDBY BUS

DC BUS 1 DC BUS 2

BATTERY

BATTCHGR

GENERATOR BUS 2

115v AC TRANSFERBUS 2

BATTERY BUS

HOT BATTERY BUS

SWITCHEDHOT BAT BUS

EXTERNAL DCRECEPTACLE

115v ACMAIN BUS 2

TR 3

º ººº

º

º

º º

º

º

º º ºº ºººº

GENDRIVE

GENDRIVE GEN

2GEN1

CONDITION: INFLIGHTBATTERY SWITCH ONSTANDBY POWER SWITCH AUTOBUS TRANSFER SWITCH AUTOENGINE GENERATOR CONNECTEDTO RESPECTIVE BUS

...

. . .

.

.

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Page 12: 737 Systems Schematics

AC Power Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

GENDRIVEGEN

2

OFF

ON

GENDRIVE

GEN1

GEN APU

GRDPWR

GEN 1 APU GEN GEN 2

GROUNDSERVICE

APU

OFF

ON

GRD POWERAVAILABLE

ºº

OFF

ON

OFF

ON

EXTERNAL AC BUS

GENERATOR BUS 1 GENERATOR BUS 2

115v AC GNDSERVICE BUS

115v ACMAIN BUS 1

115v ACMAIN BUS 2

115v AC TRANSFERBUS 1

115v AC TRANSFERBUS 2

GND SERVICERELAY ALTERNATE ALTERNATE

TRANSFERRELAY 1 TRANSFER

RELAY 1

NORMALNORMAL

CONDITION: INFLIGHTBATTERY SWITCH ONSTANDBY POWER SWITCH AUTOBUS TRANSFER SWITCH AUTOENGINE GENERATOR CONNECTEDTO RESPECTIVE BUS

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Page 13: 737 Systems Schematics

Electrical Power Controls & Monitoring Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

GENDRIVEGEN

2

GENERATOR BUS 1 GENERATOR BUS 2

115v AC TRANSFERBUS 1

115v AC TRANSFERBUS 2

DC BUS 2

FANAIR

RISE

GEN DRIVEOIL TEMP

ºC

IN160

30

2010

0 80 12040

50DO

50

0

AMPS

20

DC VOLTS 400

120

VOLTS 300100 130

120

VOLTS 300100 130

AMPERES

AC

50100

150

0

BUS TRANS

GEN 2

DRIVE TEMPRISE

IN

2

DRIVE CAN BERECONNECTEDONLY ON GRD

DISCONNECT

OFF

ON

OFF

AUTO

TRANSFERBUS OFF

LOW OILPRESSUREHIGH OILTEMP

BUSOFF

GEN OFFBUS

VOLTREG

FROMGENERATOR 1

TR 2

TR 1TR 2

TR 3

TEST

BATBATBUS

STBYPWR

APU GENGEN 2

INV

TEST

GEN 1

GRDPWR

STBYPWR

.

. ..

.

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.

Page 14: 737 Systems Schematics

DC Power System Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

BUS TRANS

OFF

AUTO

BATTERY

115v ACGROUND SERVICE BUS

SWITCHEDHOT BAT BUS

BATTERYSWITCH

TR 3DISCONNECT

RELAY

EXTERNAL DCRECEPTACLE

115v ACMAIN BUS 2

115v ACTRANSFER BUS 1

115v ACTRANSFER BUS 2

DC BUS 1 DC BUS 2

BATTERY BUS

TO APU STARTER

ALTERNATEOFF

ONHOT BATTERY BUS

BATTERYBUS

CONTROL

BATTCHGR

TR 1 TR 2 TR 3

BATTERY OFF AUTOSTANDBY POWER

SWITCH

º º

º º.

NORMAL

CONDITION: INFLIGHTBATTERY SWITCH ONSTANDBY POWER SWITCH AUTOBUS TRANSFER SWITCH AUTOGENERATOR BUSSES POWERED

. ..

.

. .

.

Page 15: 737 Systems Schematics

Standby Power System Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

BATTERY

BATTERY

TRANSFER BUS NO. 1

DC BUS NO. 1

DC STANDBY BUS

DC STANDBY BUS

DC STANDBY BUS

AC STANDBY BUS

AC STANDBY BUS

AC STANDBY BUS

BATTERY BUS

BATTERY BUS

TR

STANDBY POWER

STANDBY POWER

BAT BAT

OFFBAT

ON

OFFDAT

ON

OFF OFF

ON ON

AUTOBAT OFF

AUTOBAT OFF

AUTOBAT OFF

OR

STANDBY POWER

1

HOT BATTERY BUS

HOT BATTERY BUS

CONDITION: INFLIGHT OR ON THE GROUNDBATTERY SWITCH ONSTANDBY POWER SWITCH AUTOGENERATOR BUSSES POWERED

CONDITION: INFLIGHT OR ON THE GROUNDBATTERY SWITCH ON or OFFSTANDBY POWER SWITCH BATGENERATOR BUSSES POWERED OR NOT POWERED

CONDITION: INFLIGHTBATTERY SWITCH ONSTANDBY POWER SWITCH AUTOGENERATOR BUSSES POWERED

INV

INV

Page 16: 737 Systems Schematics

Power Plant Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

ACCESSORIES

OIL PUMPFUEL PUMPSGENERATORGENERATOR DRIVESTARTERTACHOMETERHYDRAULIC PUMP

BOOSTERS

FAN

THRUST REVERSER

TURBINES

FAN AIR

5TH STAGEBLEED AIR

ENGINEIDLE

CONTROL

POWERMANAGEMENT

CONTROL

FLT DECKCONTROLS

& INDICATORS

ENGINEFUEL

SYSTEM

AIR DRIVENSTARTER

FROMPNEUMATICSYSTEM

FROMFUEL

SYSTEM

FROMENGINE

INDICATINGSYSTEM

FROMELECTRICALSYSTEM

ENGINE START& IGNITION SYSTEM

9TH STAGEBLEED AIR

COMBUSTER

COMPRESSOR

Page 17: 737 Systems Schematics

Engine Fuel & Oil System Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

TO BEARINGS& GEARBOX

COMBUSTOR

FUEL FLOWTRANSMITTER

FUELFILLTER

FUELFILLTER

FUEL /OILHEATEXCHANGE

FIRST STAGEFUEL PUMP

ENGINE FUELSHUTOFF VALVE

FUEL HEATER

FROM FUEL TANK

FUELOIL

M E C

MEC FUELSHUTOFFVALVE

OILFILTER

OILTANK

OILPUMP

OIL RETURN

SCAVENGERPUMPS

SCAVENGERFILTER

C

C

OILQUANT

OILQUANT

FUELFLOW

LOW OILPRESSURE

FILTERBYPASS

FUEL VALVECLOSED

OIL FILTERBYPASS

IDLECONTROL

PMC

OILPRESS

Page 18: 737 Systems Schematics

ACTUATOR

Thrust Reverser Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

REVERSE THRUST (STOWED) REVERSED THRUST (DEPLOYED)

SYSTEMA

SYSTEMB

STANDBYSYSTEM

ENGINE 2SYSTEM BHYDRAULIC PRESSURE

TRANSLATING SLEEVETRANSLATING SLEEVE

BLOCKER DOOR

FAN FLOWFAN FLOW

CASCADE VANES CASCADE VANES

ISOLATEDVALVE (CLOSED)

DETENT NO. 2

DETENT NO.1

MAXIMUM RESERSE THRUST

STOWEDFORWARDTHRUSTLEVER

ISOLATEDVALVE (OPEN)

CONTROLVALVE(STOW)

CONTROLVALVE(DEPLOY)

ENGINE 2SYSTEM BHYDRAULIC PRESSURE

SYSTEMA

SYSTEMB

STANDBYSYSTEM

ACTUATOR

DEPLOY

STORED &LOCKED

Page 19: 737 Systems Schematics

Engine Fire Extinguisher Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

1 2DISCH

L R

DISCH

L R

LEFTFIRE

BOTTLE

LEFT BOTTLEDISCHARGE

RIGHT BOTTLEDISCHARGE

RIGHTFIRE

BOTTLE

SQUIB

Page 20: 737 Systems Schematics

Flight Control Surfaces Location

Boeing 737-300/400/500 Southeast Flight SupportSFS

FLIGHT SPOILERS

GROUNDSPOILERS

TRAILINGEDGEFLAPS

AILERONSELEVATOR

RUDDER

STABILIZER

SLATS

FLAPS

Page 21: 737 Systems Schematics

Roll Control Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

. .

23 6

7

AILERON

AILERONTRIM

SPOILERMIXER

AILERONFEEL &

CRNTERINGUNIT FLIGHT SPOILERS

SPOILERA B

OFF

ON

OFF

ON

AILERON TRANSFER MECHANISM

. . .. ..

.

Page 22: 737 Systems Schematics

Pitch Control Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

MATCH TRIMFAIL

FEELDIFF PRESS

STABILIZERTRIM

STABILIZERPOSITION

LEFT PITOTPROBE

A B

RIGHT PITOTPROBE

ELEVATOR FEEL& CENTERING UNIT

SPEED TRIMFAIL

AIR DATACOMPUTER

MACH TRIM ACTUATOR

FLIGHTCONTROLCOMPUTER

ELEVATORFEEL

COMPUTER

. .

.

.. .

Page 23: 737 Systems Schematics

Speed Brakes Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

SPOILERA B

OFF

ON

OFF

ON

..

. .

1 2

4 5

67 8 9

A

SPOILERMIXER

RIGHT MAINLANDING GEAR

FLIGHT SPOILERS: 2, 3, 6, 7GROUND SPOILERS: 0, 1, 4, 5, 8, 9

SPEEDBRAKE

ARMED

FLIGHT DETENT

UP

SPEED BRAKELEVER

SPEED BRAKEDO NOT ARM

SPEED BRAKEARM

GROUND SPOILERBYPASS VALVE

GROUND SPOILERCONTROL VALVE

0

3

B

Page 24: 737 Systems Schematics

.

Leading Edge Devices & Trailing Edge Flaps Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

DOWN

ALTERNATE FLAPSUP

OFF

OFF

ARM

.

AUTO SLATCONTROL

LECONTROL

STBYRES

TE FLAPCONTROL

TEDRIVEUNIT

AIR DATACOMPUTER

FLAP LOADRELIEF

COMPARATORSWITCH

TE FLAPS

TE FLAPBYPASS VALVE

FROM SYS BRESERVOIR

PTU

SYS A

SYS B

M

L R

SLATS

FLAPS FLAPSSLATS

3 44

561

23

1 2

M

.

.

.1

2 5

10

15

25

304O

UP

FLAPS

L

Page 25: 737 Systems Schematics

Pilot-Static System Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

AIR DATACOMPUTER NO. 1

STANDBYPNEUMATICAIRSPEEDALTIMETER

ELECTRICMACH

AIRSPEED

ELECTRICMACH

AIRSPEEDELECTRICALTIMETER

ELECTRICALTIMETER

INERTIALVERTICLESPEED

INERTIALVERTICLESPEED

AIR DATACOMPUTER NO. 2

PRESSURIZATIONCONTROL

CAPT STATIC

NO. 1 AUX STATIC

NO. 1 AUX PITOT

F/O PITOT

CAPT PITOT

NO. 2 AUX PITOT

PITOT

CAPT & F/O STATIC

NO. 1 & NO. 2 AUX STATICALTERNATE STATIC

ALTERNATE STATIC

NO. 2 AUX STATIC

F/O STATIC

CABIN ALTIMETERAND

DIFFERENTIAL PRESSURE

PRESSURIZATIONCONTROL

Page 26: 737 Systems Schematics

Fuel Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

CENTERTANK

TO APU

CENTER TANKSCAVENGEJETPUMP

APU FUELSHUTOFFVALVE

APUBYPASSVALVE

BYPASSVALVE

ENGINEFUELSHUTOFFVALVE

FUELSCAVENGESHUTOFFVALVE FUELING

STATION

MANUALDEFUELINGVALVE

ENGINEDRIVENFUEL PUMP

C

C

0

NO. 1TANK

NO. 2TANK

.

O

2020

40

+

+40

FUELTEMP

CROSS FEED

FUEL PUMPS

OFF

ONFUELPUMPS

L R

CTR

1

0

2

AFT FWD FWD AFT

FUEL VALVECLOSED

FUEL VALVECLOSED

FILTERBYPASS

FILTERBYPASS

LOWPRESSURE

LOWPRESSURE

LOWPRESSURE

LOWPRESSURE

LOWPRESSURE

LOWPRESSURE

VALVEOPEN

OFF

ON

Page 27: 737 Systems Schematics

Engine Start & Ignition System Schematic

Boeing 737-300/400/500 Southeast Flight SupportSFS

º º

ºº º

ºº

ºº

ºº º

ºº

º ººº ºº

º ºº

º

º

OFF

FLT

GRD CONT

ENGINE STARTBOTH

IGNL

IGNR

BATTERYBUS

MEC

AC TRANSFERBUS

AC STANDBYBUS

START VALVEOPEN

AIR DRIVENSTARTER

CUTOFF

IDLE

COMBUSTOR

BLEED AIRFUEL

STARTVALVE

STARTERCUTOUTSWITCH

SWITCHHOLDINGRELAY

FROMPNEUMATICSYSTEM

LEFTIGNITER

RIGHTIGNITER

FROMFUEL SYSTEM

ENGINEBLEED AIRVALVE

GDR

GDR

GDR

IGN L

IGN R

OFF

OFF

OFF

CONT

CONT

CONT

BOTH

BOTH

IGN R

HIGH N

LOW N

FLT

FLT

FLT

2

2

ººº

ºZ

Z

CONDITION:ENGINE BEING STARTEDN2 ROTATION BELOW STARTER CUTOUT SPEED

M

Page 28: 737 Systems Schematics

Yaw Control Schematic (after RSEP modification)

Boeing 737-300/400/500 Southeast Flight SupportSFS

.

. . . . .

.

.

RUDDERTRIM

RUDDER FEEL& CENTERING

UNIT

YAW DAMPERCOUPLER

RUDDER PCU

RPR

FFM

RPL

OFF

ON

YAW DAMPER

YAWDAMPER

CONTROLVALVE

STANDBYHYDPUMP

STANDBY HYDAOTO-ONLOGIC

CONTROLVALVE

RUDDER

STANDBY

A

BYAW

DAMPER

STANDBYRUDDER PCU

STANDBYRUDDERSHUTOFFVALVE

Page 29: 737 Systems Schematics

Standby Hydraulic System (before RSEP modification)and (after RSEP modification)

Boeing 737-300/400/500 Southeast Flight SupportSFS

STBYRUD

OFF

A ON

OFF

OFF

ARM

UP

DOWN

STBYRUD

OFF

B ON

FLT CONTROLA B

ALTERNATE FLAPS

STANDBYHYDLOW

QUANTITY

LOWPRESSURE

LOWPRESSURE

LOWPRESSURE

mnºº

ºº

TO THRUSTRESERSERS

FROMSYSTEM BRESERVOIR

STBYRES

TRAILINGEDGEDRIVEUNIT

TRAILINGEDGE FLAPBYPASSVALVE

STANDBY RUDDERSHUTOFF VALVE

FLIGHT CONTROLSHUTOFF VALVE

FLIGHT CONTROLSHUTOFF VALVE

A B

B

M

ELEVATOR &ELEVATOR FEELCOMPUTER

AILERON

RUDDER

TO EXTENDL.E.DEVICES

.

.

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