What is the maximum permissible fuel imbalance during takeoff?

What is the maximum permissible fuel imbalance during takeoff?

• A. 300 LBS
• B. 800 LBS
• C. 600 LBS
• D. 100 LBS

Answer: (A)

Fuel balance directly affects lateral stability and where the airplane’s weight is concentrated. On takeoff, keeping the CG within a specified range and maintaining enough rudder authority to steer the airplane are crucial for a safe liftoff and initial climb. The maximum permissible fuel imbalance is 300 pounds. This limit ensures the weight difference between the left and right wings stays within the certified envelope so the aircraft remains controllable and stable with normal pilot inputs. If the imbalance were larger, the heavier wing would shift the CG toward that side, increasing yaw and rudder demand and potentially degrading directional control during takeoff. In practice, if you’re above this limit, you balance fuel before takeoff, typically by transferring fuel between tanks via the crossfeed system or by other approved procedures. The other options exceed the published limit or are not the standard allowance.

Fuel balance directly affects lateral stability and where the airplane’s weight is concentrated. On takeoff, keeping the CG within a specified range and maintaining enough rudder authority to steer the airplane are crucial for a safe liftoff and initial climb. The maximum permissible fuel imbalance is 300 pounds. This limit ensures the weight difference between the left and right wings stays within the certified envelope so the aircraft remains controllable and stable with normal pilot inputs. If the imbalance were larger, the heavier wing would shift the CG toward that side, increasing yaw and rudder demand and potentially degrading directional control during takeoff. In practice, if you’re above this limit, you balance fuel before takeoff, typically by transferring fuel between tanks via the crossfeed system or by other approved procedures. The other options exceed the published limit or are not the standard allowance.