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The CG moves forward
CTR TK PUMPS.....................................................................................................................OFF
If the center tank is not yet empty, maintain fuel in the aircraft’s center tank by switching off the
pumps. This will reduce the effect of unusable trim tank fuel on the aircraft’s center of gravity.
MAXIMUM FLIGHT TIME..............................................................................................4 HOURS
After 4 h, depending on the fuel distribution, the aft CG limit may be reached.
FOR LANDING
If CG > aft CG limit shown below:
APPR SPD.............................................................................................................VLS +10 KT
LDG DIST PROC........................................................................................................... APPLY
Refer to 99 Duref Cible QRH, or Refer to 99 Duref Cible FCOM.
To keep the nosewheel on the runway and prevent the aircraft from sitting on its tail, apply
continuous braking throughout the landing rollout.
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 85/98
FCOM 19 AUG 10
TRIM TANK FUEL UNUSABLE (Cont'd)
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
FUEL
A330/A340 FLEET PRO-ABN-28 P 86/98
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 1+2+3+4...................................................................................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.
LEAK AFTER ENG FAIL:
This procedure must be applied if the leak occured after an engine failure. The leak could be
caused by an engine rotor burst, having damaged the fuel tanks and/or fuel pipes.
FUEL X FEED 1+2+3+4........................................................................... MAINTAIN CLOSED
Crossfeed valves must remain closed to prevent the leak from affecting both sides.
FUEL LOSS REDUCTION proc..............................................................................CONSIDER
Refer to PRO-ABN-28 FUEL LOSS REDUCTION.
If collector cell(s) of Engine 2 and/or 3 deplete below 500 kg:
FUEL CELL NOT FULL
For prolonged flights, with split valves closed, the forward part of the inner tanks may
empty sooner than the aft part. Consequently, collector cell(s) may deplete.
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 87/98
FCOM 19 AUG 10
FUEL LEAK (Cont'd)
JETTISON (if in operation)...........................................................................................OFF
FUEL X FEED (to operating engines)........................................................................... ON
Do not open the fuel crossfeed valve of the failed engine. Opening the fuel X-FEED
valves to the operating engines avoids an Engine 2 and/or 3 flameout.
CAUTION Do not apply the FUEL IMBALANCE procedure. Approach and landing
can be done, even with one full wing/one empty wing.
OTHER CASES
This procedure must be applied for any other leak source, whether or not the leak is located.
Stop any fuel transfer, and then monitor the depletion rate of each inner tank, to determine if
the leak is from an engine or a wing (case 1), or from the Center tank, the Trim tank, or the
APU/Trim feeding line (case 2).
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 7(144)
