What is the maximum fuel imbalance allowed during takeoff?

The maximum fuel imbalance allowed during takeoff is 100 lbs. This regulatory guidance ensures that aircraft performance is not adversely affected by uneven fuel distribution across the wing tanks. A fuel imbalance can lead to unanticipated aircraft handling characteristics, especially during critical phases of flight like takeoff, where symmetry is vital for maintaining control.

When fuel is distributed evenly, it helps in managing the aircraft's weight and center of gravity, which are crucial for stability and performance. Exceeding the 100 lbs threshold could lead to difficulties in controlling the aircraft and may compromise safety. This limit is set to minimize risks related to handling, performance metrics, and structural integrity of the aircraft during takeoff.