Where does the APU obtain fuel for operation?

The auxiliary power unit (APU) primarily obtains fuel from the right wing collector tank. This tank is designed to provide a reliable source of fuel for the APU, ensuring it can operate efficiently when needed. The right wing collector tank gathers fuel from the main tanks, allowing the APU to function without drawing from the main tanks directly. This system promotes more effective fuel management during operations, especially when the aircraft is on the ground and auxiliary power is required, such as for starting the main engines or providing electrical power to the aircraft systems while the engines are not running.

Other fuel sources, like the left wing fuel tank or the central fuel tank, are not typically designated for APU operation in most aircraft configurations. The fuel dump system is specifically designed for releasing fuel in emergencies to reduce weight before landing and is not used for APU operation.