Can the aircraft be refueled when only battery power is available?

Can the aircraft be refueled when only battery power is available?

• A. No
• B. Yes
• C. Only with a GPU
• D. Only if external power is active

Answer: (B)

Power comes from the aircraft’s electrical system, and the fuel pumps are electric devices fed from that system. The wing fuel pumps can be powered by the essential DC bus, which in turn can be supplied by the battery when there are no engine generators, APU, or external power available. Because of this, refueling can be carried out with only battery power on board—the pumps will run and deliver fuel even without GPU or external power. External power or a GPU isn’t strictly required for refueling, although they can provide faster pumping or support other systems during the operation.

Power comes from the aircraft’s electrical system, and the fuel pumps are electric devices fed from that system. The wing fuel pumps can be powered by the essential DC bus, which in turn can be supplied by the battery when there are no engine generators, APU, or external power available. Because of this, refueling can be carried out with only battery power on board—the pumps will run and deliver fuel even without GPU or external power. External power or a GPU isn’t strictly required for refueling, although they can provide faster pumping or support other systems during the operation.