Reference should be made to the fuel supply system shown in annex.In flight, with centre tank empty and APU operating, a fuel unbalance is detected (quantity in tank 1 < quantity in tank 2). Rebalancing of the two tanks is:
Domanda 382, Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license
Impossible Without Causing The Apu To Stop.
Possible with 'CROSSFEED' open and tank 1 pumps 'OFF' and tank 2 pumps 'ON'.
Impossible because there is no fuel in centre tank.
Possible With 'crossfeed' Open And Tank 2 Pumps 'off'.