What is the maximum fuel imbalance permitted when refueling or defueling?

The maximum fuel imbalance permitted when refueling or defueling is 2,500 lbs. This limit is established to ensure safe operational performance and stability of the aircraft during flight. Maintaining a fuel imbalance within this range helps prevent potential issues related to aircraft control and performance, especially during critical phases such as takeoff, landing, and navigating. By adhering to this limit, pilots and ground crews can ensure that fuel distribution does not adversely affect the aircraft's handling characteristics, thereby promoting safety and efficiency during operations. The specified maximum helps establish consistent fueling procedures and minimizes risks associated with fuel distribution that could impair the aircraft's operational effectiveness.