What is the maximum fuel imbalance allowed under normal operations?

What is the maximum fuel imbalance allowed under normal operations?

• A. 1000 lbs
• B. 2000 lbs
• C. 500 lbs
• D. 250 lbs

Answer: (C)

Balancing fuel between the left and right wings is essential to keep the aircraft’s center of gravity within safe limits during normal flight. When one wing is heavier due to more fuel, the aircraft can become harder to control, requiring more rudder and aileron input to stay level, and it can complicate engine fuel delivery if an imbalance reduces feed to an engine. The design expectation is that pilots manage fuel distribution so the imbalance stays within a safe threshold. For normal operations, that threshold is 500 pounds. Keeping within this limit maintains predictable handling and reliable performance across engine-out and single- engine scenarios, and makes fuel transfer or crossfeed actions straightforward if needed. If the imbalance approaches this amount, transfer fuel between tanks or use crossfeed to rebalance, or plan to land and refuel to restore balance. The other numbers would either exceed safe handling margins or be more restrictive than needed for normal operations.

Balancing fuel between the left and right wings is essential to keep the aircraft’s center of gravity within safe limits during normal flight. When one wing is heavier due to more fuel, the aircraft can become harder to control, requiring more rudder and aileron input to stay level, and it can complicate engine fuel delivery if an imbalance reduces feed to an engine. The design expectation is that pilots manage fuel distribution so the imbalance stays within a safe threshold. For normal operations, that threshold is 500 pounds. Keeping within this limit maintains predictable handling and reliable performance across engine-out and single- engine scenarios, and makes fuel transfer or crossfeed actions straightforward if needed. If the imbalance approaches this amount, transfer fuel between tanks or use crossfeed to rebalance, or plan to land and refuel to restore balance. The other numbers would either exceed safe handling margins or be more restrictive than needed for normal operations.