What is the maximum permissible fuel imbalance in all other phases of flight?

What is the maximum permissible fuel imbalance in all other phases of flight?

• A. 800 LBS
• B. 300 LBS
• C. 1000 LBS
• D. 0 LBS

Answer: (A)

Fuel imbalance between the left and right wing tanks shifts the airplane’s center of gravity laterally. To keep the airplane’s lateral handling and structural limits safe, there is a limit on how unbalanced the wing tanks can be. For the CRJ-550, the allowed difference between the left and right wing tanks is 800 pounds in all flight phases. This provides enough margin for normal fuel burn differences while preventing excessive roll tendencies or CG excursions. If the imbalance starts to approach this limit, balance the fuel by using the crossfeed to transfer fuel from the heavier wing to the lighter wing. The center tank fuel doesn’t affect lateral balance, since it is centered.

Fuel imbalance between the left and right wing tanks shifts the airplane’s center of gravity laterally. To keep the airplane’s lateral handling and structural limits safe, there is a limit on how unbalanced the wing tanks can be. For the CRJ-550, the allowed difference between the left and right wing tanks is 800 pounds in all flight phases. This provides enough margin for normal fuel burn differences while preventing excessive roll tendencies or CG excursions. If the imbalance starts to approach this limit, balance the fuel by using the crossfeed to transfer fuel from the heavier wing to the lighter wing. The center tank fuel doesn’t affect lateral balance, since it is centered.