What is the maximum allowable fuel imbalance on the ERJ 175 before landing?

What is the maximum allowable fuel imbalance on the ERJ 175 before landing?

• A. 794 lbs
• B. 600 lbs
• C. 1000 lbs
• D. 500 lbs

Answer: (A)

The limit on fuel imbalance is about keeping the airplane controllable and safe to land with a balanced weight distribution between the wings. If one wing carries significantly more fuel than the other, the heavier wing can cause adverse yaw and increased rudder or aileron demand, especially with landing configurations and flap settings. This is why a specific maximum imbalance is defined in the airplane’s limitations. For the ERJ 175, the allowable difference in usable fuel between the left and right wing tanks before landing is 794 pounds. This value accounts for the aircraft’s fuel transfer capability and the rudder authority available during approach and touchdown, ensuring stable, controllable landing performance. If the imbalance were to exceed that limit, crews would transfer fuel between tanks (via the crossfeed/balance system) or adjust operations to bring the distribution within the limit before landing. The other numbers listed in the options do not reflect the ERJ 175’s specified limit.

The limit on fuel imbalance is about keeping the airplane controllable and safe to land with a balanced weight distribution between the wings. If one wing carries significantly more fuel than the other, the heavier wing can cause adverse yaw and increased rudder or aileron demand, especially with landing configurations and flap settings. This is why a specific maximum imbalance is defined in the airplane’s limitations.

For the ERJ 175, the allowable difference in usable fuel between the left and right wing tanks before landing is 794 pounds. This value accounts for the aircraft’s fuel transfer capability and the rudder authority available during approach and touchdown, ensuring stable, controllable landing performance.

If the imbalance were to exceed that limit, crews would transfer fuel between tanks (via the crossfeed/balance system) or adjust operations to bring the distribution within the limit before landing. The other numbers listed in the options do not reflect the ERJ 175’s specified limit.