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FUEL X FEED 1+2+3+4........................................................................... MAINTAIN CLOSED
All crossfeed valves must remain closed to prevent the leak from affecting both sides.
L+R CTR PUMPS...............................................................................................................OFF
T TANK FEED................................................................................................................... ISOL
INNER TANKS FUEL QUANTITIES.........................................................................MONITOR
Monitor the depletion rate of each inner tank.
CASE 1: IF ONE INNER TANK DEPLETES FASTER THAN THE OTHER BY AT
LEAST 300 kg (660 lb) IN LESS THAN 30 min:
DESCEND TO GRAVITY FEED CEILING
Refer to PRO-ABN-28 GRVTY FUEL FEEDING.
ENG START SEL (reaching gravity feeding)................................................................IGN
INR TANK PUMPS on the leaking side.......................................................................OFF
In almost all cases, switching the pumps off on the leaking side will prevent additional
fuel loss.
AVOID NEGATIVE G FACTOR
If one engine rapidly flames out when there is still fuel in the feeding tank:
ALL INR TANK PUMPS.......................................................................................... ON
L+R CTR PUMPS....................................................................................................ON
T TANK FEED.................................................................................................... AUTO
LEAK FROM ENGINE/PYLON proc..................................................................APPLY
Note: The flameout is due to air suction from a leak from the engine.
To be continued on next page
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
FUEL
A330/A340 FLEET PRO-ABN-28 P 88/98
FCOM 19 AUG 10
FUEL LEAK (Cont'd)
If no engine rapidly flames out when there is still fuel in the feeding tank:
FUEL LOSS REDUCTION proc.................................................................CONSIDER
Refer to PRO-ABN-28 FUEL LOSS REDUCTION.
CAUTION Do not apply the FUEL IMBALANCE procedure. Approach and landing
can be done, even with one full wing/one empty wing.
CASE 2: IF BOTH INNER TANKS DEPLETE AT A SIMILAR RATE:
A leak from the Center tank, the Trim tank, or the APU/Trim feeding line may be
suspected.
L+R CTR PUMPS.......................................................................................................... ON
If fuel smell in the cabin:
APU (if ON.............................................................................................................OFF
T TANK FEED....................................................................................MAINTAIN ISOL
This prevents additional fuel loss through the APU/Trim feeding line.
If no fuel smell in the cabin:
A leak from the Center tank or the Trim tank may be suspected.
FUEL LOSS REDUCTION proc.................................................................CONSIDER
Refer to PRO-ABN-28 FUEL LOSS REDUCTION.
FOR LANDING
CAUTION Do not use reversers.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
FUEL
A330/A340 FLEET PRO-ABN-28 P 89/98
FCOM 19 AUG 10
FUEL LEAK
Applicable to:
A fuel leak may be detected by:
The sum of FOB and FU is significantly less than FOB at engine ‐ start, or is decreasing, or
‐ A passenger observes a fuel spray from an engine/pylon, or a wing tip, or
‐ The total fuel quantity is decreasing at an abnormal rate, or
‐ A fuel imbalance is developing, or
‐ Fuel quantity of a tank is decreasing too fast (leak from engine/pylon, or hole in a tank), or
‐ A tank is overflowing (due to pipe rupture in a tank), or
‐ The Fuel Flow is excessive (leak from engine), or
‐ Fuel is smelt in the cabin.
If visibility permits, leak source may be identified by a visual check from the cabin.
WHEN A LEAK IS CONFIRMED
LAND ASAP
LEAK FROM ENGINE/PYLON CONFIRMED:
Engine fuel leak can be confirmed by excessive fuel flow indication, or a visual check.
THR LEVER (of affected engine)...................................................................................... IDLE
ENG MASTER (of affected engine)....................................................................................OFF
FUEL X FEED.................................................................................................. USE AS RQRD
If the leak stops, the crossfeed valves can now be opened to re-balance fuel quantity, or to
enable use of fuel from both wings. Do not restart the engine.
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 7(145)
