From where is fuel delivered to the FCU and motive flow pumps?

• A. From the tanks via motive flow pumps.
• B. From the oil-to-fuel heat exchanger.
• C. From the atmosphere.
• D. From the main battery.

Answer: (A)

Fuel to the FCU is drawn from the aircraft’s fuel tanks and moved to the FCU by motive flow pumps. These pumps are part of the engine’s fuel system and create the necessary pressure to deliver fuel from the tanks to the FCU, ensuring a steady, metered supply for proper engine operation. The oil-to-fuel heat exchanger is only for cooling the fuel, not a source of it. Atmosphere doesn’t supply fuel, and the main battery provides electrical power, not fuel.