cross-feed

cross-feed

cross-feedA system in a multiengine airplane by which fuel or oil may be transferred from engine to engine, or from tank to tank. Tank-to-tank transfer, especially from one side of an aircraft to another in a single-engine aircraft, is also referred to as cross-feed.
A typical cross-feed cock. In ‘NORM' position all pumps are energized. ‘AFT' position energizes pumps in the aft tank, opens cross-feed valve and transfers fuel to the engine and forward tank. Selection of switch to ‘FORWARD' position energizes the pump in the forward tank, opens cross-feed valve and transfers fuel to the engine and aft tank.