W100l2.1

Driftdown and Oxygen

Procedures Over High Terrain

Driftdown and Oxygen

Procedures Over High TerrainAn Airline PerspectiveAn Airline Perspective

Paul TateManager

Flight Technical Support ServicesBritish AirwaysSeptember 2003

Paul TateManager

Flight Technical Support ServicesBritish AirwaysSeptember 2003

W100l2.2British Airways

Driftdown ScenarioDriftdown Scenario

ISB-LHR

777-200IGW GE90-85B

British Airways procedureTop level down procedureLevel of detail increases as required

ISB-LHR

777-200IGW GE90-85B

British Airways procedureTop level down procedureLevel of detail increases as required

W100l2.3British Airways

Requirements to Calculate DriftdownRequirements to Calculate Driftdown

JAR-OPS 1.500 en route one engine Inop

JAR-OPS 1.505 en route two engines Inop

JAR-OPS 1.500 en route one engine Inop

JAR-OPS 1.505 en route two engines Inop

W100l2.4British Airways

W100l2.5British Airways

W100l2.6British Airways

W100l2.7British Airways

MSA in Flight Planning System based on 20 nm either side of track and distance between points.

Highest MSA from Flight Planning System is 27,600 ft.

MSA in Flight Planning System based on 20 nm either side of track and distance between points.

Highest MSA from Flight Planning System is 27,600 ft.

W100l2.8British Airways

TOW ~ 250,000 kg, wt @ crit point ~240,000 kgNet level-off height ISA = 18,000 ftNet level-off height ISA+10 = 16,000 ftNet level-off height ISA+20 = 14,000 ftMSA 27,600 ft

Driftdown analysis required

TOW ~ 250,000 kg, wt @ crit point ~240,000 kgNet level-off height ISA = 18,000 ftNet level-off height ISA+10 = 16,000 ftNet level-off height ISA+20 = 14,000 ftMSA 27,600 ft

Driftdown analysis required

W100l2.9British Airways

MSA may be improved by inserting ghost waypoints.

Doesnt help in this caseNeed to look at band width

MSA may be improved by inserting ghost waypoints.

Doesnt help in this caseNeed to look at band width

W100l2.10British Airways

30,00030,000

Altitude,ftAltitude,ft

Distance from ISB, nmDistance from ISB, nm

PeshawarPeshawar

Flight Plan MSAsFlight Plan MSAs

GerryGerry

FiruzFiruz DinarDinarChitralChitral

PaddyPaddy TopazTopazMirzoMirzo

Ura-TyubeUra-Tyube

SyrdaryaSyrdarya

25,00025,000

20,00020,000

15,00015,000

10,00010,000

5,0005,000

0000 100100 200200 300300 400400 500500 600600 700700

W100l2.11British Airways

ATC constraint - Min FL310 by Paddy and constant FL required

TOW limitation

Climb Distance limit, not Altitude capability

Agreed special departure procedure with ATC

ATC constraint - Min FL310 by Paddy and constant FL required

TOW limitation

Climb Distance limit, not Altitude capability

Agreed special departure procedure with ATC

W100l2.12British Airways

W100l2.13British Airways

Developed a Spreadsheet Tool to Handle All Data and Analyse ProfileDeveloped a Spreadsheet Tool to Handle All Data and Analyse Profile

Terrain information

Climb and cruise data

Driftdown

Profile

Terrain information

Climb and cruise data

Driftdown

Profile

W100l2.14British Airways

Flight Crew ProceduresFlight Crew Procedures

TOW restrictions

Flight level restrictions

Correction to crit point for wind

Offset following failure

Fuel jettison

TOW restrictions

Flight level restrictions

Correction to crit point for wind

Offset following failure

Fuel jettison

W100l2.15British Airways

Other Things to CheckOther Things to Check

Geometric height versus pressure altitude

Fuel jettison

Escape routings

Flight crew understanding (advisory material)

Simulator check

Geometric height versus pressure altitude

Fuel jettison

Escape routings

Flight crew understanding (advisory material)

Simulator check

W100l2.16British Airways

Oxygen ScenarioOxygen Scenario

ISB-LHR

777-200IGW GE90-85B

British Airways procedureTop level down procedureLevel of detail increases as required

ISB-LHR

777-200IGW GE90-85B

British Airways procedureTop level down procedureLevel of detail increases as required

W100l2.17British Airways

Requirement to OxygenRequirement to Oxygen

JAR-OPS 1.760 - First Aid Oxygen

JAR-OPS 1.770 - Supplementary Oxygen -Pressurised aeroplanes

JAR-OPS 1.760 - First Aid Oxygen

JAR-OPS 1.770 - Supplementary Oxygen -Pressurised aeroplanes

W100l2.18British Airways

Flight Plan MSAsFlight Plan MSAs

Worst case scenario

Max pax and crew

Time and distance at minimum flight levels

Cruise at or below 10,000 feet

Worst case scenario

Max pax and crew

Time and distance at minimum flight levels

Cruise at or below 10,000 feet

W100l2.19British Airways

30,00030,000

Altitude,ftAltitude,ft

Distance from ISB, nmDistance from ISB, nm

PeshawarPeshawar

GerryGerry

FiruzFiruz DinarDinarChitralChitral

PaddyPaddy TopazTopazMirzoMirzo

Ura-TyubeUra-Tyube

SyrdaryaSyrdarya

25,00025,000

20,00020,000

15,00015,000

10,00010,000

5,0005,000

0000 100100 200200 300300 400400 500500 600600 700700

Flight Plan MSAsFlight Plan MSAs

W100l2.20British Airways

Reduction of band width15 nm, 10 nm, 5 nm

Simplify flight crew procedureSame crit pointSimple let down

Flight crew understanding (advisory material)

Reduction of band width15 nm, 10 nm, 5 nm

Simplify flight crew procedureSame crit pointSimple let down

Flight crew understanding (advisory material)

W100l2.21British Airways

SummaryDriftdown and Oxygen Procedure -

Airline perspective Lessons learnt

Future?Flight Planning System calculations

SummaryDriftdown and Oxygen Procedure -

Airline perspective Lessons learnt

Future?Flight Planning System calculations

W100l2.22British Airways