What is the normal position of the fuel crossfeed valve?

The normal position of the fuel crossfeed valve is closed. This position is essential for ensuring that fuel flows through the appropriate fuel system routes under standard operational conditions. When the valve is closed, each engine receives fuel from its designated tank, which promotes balanced fuel consumption and minimizes the risk of fuel starvation.

In contrast, keeping the valve open could lead to undesirable fuel transfer between tanks, which could complicate fuel management and potentially lead to handling or safety issues during flight. The closed position helps maintain structural integrity and operational stability by ensuring that each engine operates independently from its own fuel supply.

During specific situations, such as in an alternate fuel configuration or engine failure scenario, the crossfeed valve may be opened to allow for fuel to be supplied from one tank to another engine. However, under typical operational conditions, the crossfeed valve remains closed to optimize performance and safety.