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�� IF TRIM TK QUANTITY NOT DECREASING:
T TANK MODE..............................................................................................................AUTO
T TANK FEED.................................................................................................................ISOL
T TK FUEL UNUSABLE
L2 These steps prevent uncommanded aft transfer via a failed aft transfer valve.
L1�� If is CG forward of 32 %:
L2 Trim tank transfer has to be done in two steps.
L1�� WHEN T TANK < 2.4 T:
T TANK MODE..............................................................................................................AUTO
L2 Displayed in all other cases.
L1 T TANK FEED...............................................................................................................AUTO
L2 Displayed if the trim tank isolation valve is failed closed or if the trim tank low level sensor is
failed.
This stops the tranfer after the first step.
L1�� WHEN CTR TANK EMPTY:
T TANK MODE................................................................................................................FWD
L2 Displayed in all other cases.
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 38/98
FCOM 19 AUG 10
FUEL T TANK XFR FAULT (Cont'd)
L1 T TANK FEED...............................................................................................................OPEN
L2 Displayed if the trim tank isolation valve is failed closed or if the trim tank low level sensor is
failed.
If the trim tank pump is failed or not installed, the above step is preceded by:
When CTR TANK EMPTY AND WHEN SPD > 270 kt KT AND NOT IN CLIMB:
L1�� WHEN T TANK EMPTY:
T TANK MODE.................................................................................................................... AUTO
L2 Displayed in all other cases.
L1 T TANK FEED..................................................................................................................... AUTO
L2 Displayed if the trim tank isolation valve is failed closed or if the trim tank low level sensor is
failed.
L1�� If either aft transfer valve failed open:
T TANK FEED.................................................................................................................ISOL
�� IF T TK FUEL UNUSABLE:
T TK UNUSBL PROC........................................................................................................ APPLY
L12
STATUS
�� WHEN SPD > 270 KT AND NOT IN CLIMB:
T TANK MODE................................................................ FWD
T TANK FEED............................................................... OPEN
Displayed if trim tank pump is failed or not installed.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
FUEL
A330/A340 FLEET PRO-ABN-28 P 39/98
FCOM 19 AUG 10
FUEL T TANK XFR FAULT
Applicable to:
T TANK MODE...........................................................................................................................FWD
L2 Displayed in all other cases.
L1 T TANK FEED...........................................................................................................................OPEN
L2 Fuel consumption is increased by approximately 1 %.
Either line (a) or (b) will be displayed.
Displayed if the trim tank isolation valve is failed closed or if the trim tank low level sensor is failed.
Note: 1. If the trim tank pump is failed or not installed, the above procedure is preceded by:
WHEN SPD > 270 kt AND NOT IN CLIMB:
2. If forward transfer is initiated by T TANK FEED sw, do not completely empty the trim
tank (below around 200 kg). This avoids drainage of the trim line and so ensures APU
supply.
L1�� If either aft transfer valve is failed open:
FUEL IMBALANCE....................................................................................................... MONITOR
�� IF TRIM TK QUANTITY NOT DECREASING:
T TANK MODE..............................................................................................................AUTO
T TANK FEED.................................................................................................................ISOL
T TK FUEL UNUSABLE
L2 These steps prevent uncommanded aft transfer via a failed aft transfer valve.
L1�� If is CG forward of 32 %:
L2 Trim tank transfer has to be done in two steps.
L1�� WHEN T TANK < 2.4 T:
T TANK MODE..............................................................................................................AUTO
　
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