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The main fuel pump system supplies fuel from the wing tanks to the engines. The system has four
main fuel pumps.
MAIN COMPONENTS
Applicable to: ,
, MSN,,
TANK PUMPS
In normal operation each engine is supplied from two pumps in its own side wing tank.
Applicable to:
MSN,
In normal operation each engine is supplied by one pump in the center tank or two pumps in its own
side wing tank.
All wing tank pumps remain on throughout the flight. They are fitted with pressure relief sequence
valves which ensure that, when all pumps are running, the center tank pumps will deliver fuel
preferentially.
Applicable to:
MSN,
TRANSFER VALVES
Two electrical transfer valves are mounted in each wing to permit fuel transfer from outer to inner
tank.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - ENGINE FEED
A318/A319/A320/A321 FLEET DSC-28-10-30 P 2/12
FCOM 19 AUG 10
Applicable to: ALL
CROSS FEED VALVE
A cross feed valve controlled by a double motor allows both engines to be fed from one side or
one engine to be fed from both sides.
Applicable to: ALL
ENGINE LP VALVES
The fuel flow to an engine can be stopped by its low pressure (LP) fuel valve, the closure of the LP
fuel valve is by :
‐ the engine master switch, or
‐ the ENG FIRE PUSH pushbutton.
Applicable to:
MSN,
Closed by pumps pressure in normal operation, they allow engines to be fed by gravity if the inner
tank pumps fail.
Note: Center tank pumps are not fitted with suction valves. Therefore, gravity feeding is not
possible from the center tank.
Applicable to: ,
, MSN,,
Closed by pumps pressure in normal operation, they allow engines to be fed by gravity if the wing
tank pumps fail.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - ENGINE FEED
A318/A319/A320/A321 FLEET DSC-28-10-30 P 3/12
FCOM 19 AUG 10
ENGINE FEED
Applicable to:
MSN,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - ENGINE FEED
A318/A319/A320/A321 FLEET DSC-28-10-30 P 4/12
FCOM 19 AUG 10
ENGINE FEED
Applicable to: ,
, MSN,,
FUEL FEED SEQUENCE
Applicable to:
The tanks empty in the following sequence :
1. The center tank.
2. The inner tanks : Each inner tank empties down to 750 kg (1 650 lb).
3. The outer tanks : Fuel transfers into the inner tanks.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - ENGINE FEED
A318/A319/A320/A321 FLEET DSC-28-10-30 P 5/12
FCOM 19 AUG 10
CENTER TANK PUMPS CONTROL LOGIC
* Each center tank pump stops, until approximately 500 kg (1 100 lb ) of the fuel in its associated
inner tank fuel has been used (when the fuel level reaches the underfull sensors).
With the MODE SEL in the MAN position, the center tank pumps will run. In manual mode, the
CTR TK PUMP pushbuttons must be selected OFF, when the center tank is empty.
FUEL TRANSFER FROM OUTER TO INNER TANKS
The transfer valves automatically open, when the inner tank fuel reaches the low level (about
750 kg/1 650 lb), thus enabling the fuel to drain from the outer to inner tanks.
When open, the valves are latched open. They will automatically close at the next refueling
operation.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - ENGINE FEED
A318/A319/A320/A321 FLEET DSC-28-10-30 P 6/12
FCOM 19 AUG 10
Note: 1. Two level sensors are installed in each inner tank. Each sensor controls two transfer
valves, one in each wing, ensuring simultaneous transfer to both wings.
2. The 750 kg/1 650 lb value is based on a level aircraft attitude, with no acceleration.
During steep descent or acceleration/deceleration, the transfer valves may open with
more than 750 kg/1 650 lb of fuel in each inner tank, and the low level warning may be
triggered.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - ENGINE FEED
A318/A319/A320/A321 FLEET DSC-28-10-30 P 7/12
FCOM 19 AUG 10
ECAM INDICATION
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FUEL
DESCRIPTION - ENGINE FEED
A318/A319/A320/A321 FLEET DSC-28-10-30 P 8/12
FCOM 19 AUG 10
FUEL FEED SEQUENCE
Applicable to:
MSN,
The tanks empty in the following sequence :
1. The center tank.
2. The inner tanks : Each inner tank empties down to 750 kg (1 650 lb).
　
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