ATA 28

ALL WING PUMPS ARE RUNNING, MOD SEL IN MAN AND XFRVALVES ARE OPENED: (A321)

• Fuel transfers from center tank to wing tanks without any protection

• Nothing happens

• Fuel transfers from center tank to wing tanks controlled bythe full sensors

FUEL FROM THE VENT SURGE TANK RETURNS BACK INTO THEOUTER CELL BY: (A320)

• By gravity

• A scavenge jet pump

• A DC electric fuel pump

FULL LEVEL SENSORS ARE FITTED IN: (A320)

• Inner and outer cells

• Inner cells and center tank

• Outer cells only

IN FLIGHT, SLATS ARE EXTENDED, WITH FUEL IN THE CENTERTANK, AUTO MODE IS SELECTED (A320):

• Center tank pumps start.

• Center tank pumps stop.

• Center tank pumps start to transfer fuel to the wing tanks.

IN NORMAL OPERATION, THE WING TANK PUMPS:

• Run continuously

• Stop when center tank pumps are running

• Run if center tank is empty

ONCE OPEN, THE TRANSFER VALVES WILL CLOSE: (A320)

• Manually by the mechaniC.

• Automatically when outer cell is empty.

• Automatically at the next refuelling.

THE APU FUEL IS NORMALLY SUPPLIED FROM:

• From the right supply line.

• From the left supply line.

• Both A & B.

THE APU FUEL PUMP IS ELECTRICAL SUPPLIED BY THE:

• AC ESS SHED bus or the batteries via the static inverter

• The batteries via the static inverter

• Hot BAT bus

THE APU PUMP OPERATION IS CONTROLLED BY:

• APU Pressure switch.

• A push-button switch on the overhead panel.

• A push-button switch on the Refuel/Defuel panel.

THE FUEL QUANTITY INDICATING SYSTEM COMPRISES:

• Two FQIC and two FLSCU.

• One FQIC and two FLSCU.

• One FQIC and one FLSCU.