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OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - CG CONTROL - TRIM TANK TRANSFER
A330/A340 FLEET DSC-28-10-90 P 18/22
FCOM 19 AUG 10
Applicable to:
SCHEMATIC
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - CG CONTROL - TRIM TANK TRANSFER
A330/A340 FLEET DSC-28-10-90 P 19/22
FCOM 19 AUG 10
Applicable to: ,
SCHEMATIC
MANUAL FORWARD FUEL TRANSFER
Applicable to:
When the T. TANK pushbutton is pressed, the FWD light comes on white, and :
The ‐ TRIM TK ISOL valve opens.
‐ The AUX FWD XFR valve opens.
‐ The TRIM PIPE ISOL valve closes.
‐ The two AFT XFR valves close.
‐ The trim tank forward transfer pump starts.
The forward transfer pump transfers the fuel from the trim tank to the center tank.
Center tank overflow must be manually prevented, by releasing the pushbutton when the tank is full.
When the T. TANK pushbutton is released, the forward transfer stops.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - CG CONTROL - TRIM TANK TRANSFER
A330/A340 FLEET DSC-28-10-90 P 20/22
FCOM 19 AUG 10
MANUAL FORWARD FUEL TRANSFER
Applicable to:
When the T. TANK pushbutton is pressed, the FWD light comes on white, and :
The ‐ TRIM TK ISOL valve opens.
‐ The AUX FWD XFR valve opens.
‐ The TRIM PIPE ISOL valve opens.
‐ The two AFT XFR valves close.
‐ The trim tank forward transfer pump starts.
Fuel transfers from the trim tank to the inner tanks through the forward transfer pump.
Inner tank overflow must be manually prevented, by releasing the pushbutton when the tank is full.
When the T. TANK pushbutton is released, the forward transfer stops.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - CG CONTROL - TRIM TANK TRANSFER
A330/A340 FLEET DSC-28-10-90 P 21/22
FCOM 19 AUG 10
MANUAL FORWARD FUEL TRANSFER
Applicable to: ,
When the T. TANK pushbutton is pressed, the FWD light comes on white, and :
‐ The TRIM TK ISOL valve opens.
‐ The AUX FWD XFR valve opens.
‐ The TRIM PIPE ISOL valve closes.
‐ The two AFT XFR valves close.
‐ The trim tank forward transfer pump starts.
Fuel transfers from the trim tank to the center tank.
Center tank overflow must be manually prevented, by releasing the pushbutton when the tank is full.
When the T. TANK pushbutton is released, the forward transfer stops.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - CG CONTROL - TRIM TANK TRANSFER
A330/A340 FLEET DSC-28-10-90 P 22/22
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - APU FEED
A330/A340 FLEET DSC-28-10-100 P 1/14
FCOM 19 AUG 10
FWD APU PUMP FEED
Applicable to:
The APU is fed from the Engine 2 collector cells (in the left inner tank) through the APU FWD pump
and the APU ISOL valve when :
On the ground after 2 min (except ‐ during trim tank refueling), or
‐ In flight below FL 255, or
‐ In flight above FL 255, when the trim tank is empty.
In this case, the AFT APU pump is not running.
FWD APU PUMP FEED
Applicable to: ,
The APU is fed from the Engine 1 collector cells (in the left inner tank) through the APU FWD pump
and the APU ISOL valve when :
‐ On the ground after 2 min (except during trim tank refueling), or
‐ In flight below FL 255, or
‐ In flight above FL 255, when the trim tank is empty.
In this case, the AFT APU pump is not running.
AFT APU PUMP FEED
Applicable to: ALL
The APU is fed from the trim pipe :
‐ The first two minutes when on the ground, or
‐ During trim tank refueling or,
‐ During an aft transfer.
The APU is fed from the trim tank :
‐ In flight above FL 255, as long as the trim tank is not empty, or
‐ During a forward transfer.
In the above cases, the :
‐ AFT APU pump is running.
‐ FWD APU pump is not running.
‐ APU ISOL valve is closed.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - APU FEED
A330/A340 FLEET DSC-28-10-100 P 2/14
FCOM 19 AUG 10
Note: The AFT APU pump will automatically start, in the event of FWD APU pump failure.
APU FEED
Applicable to:
LH INR TK
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - APU FEED
A330/A340 FLEET DSC-28-10-100 P 3/14
FCOM 19 AUG 10
TRIM PIPE
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
　
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