If the fuel imbalance exceeds 200 pounds, which tank is filled first?

• A. The high tank
• B. The low tank
• C. Both equally
• D. The tank with less fuel sensor reading

Answer: (B)

When you have a fuel imbalance, the goal is to bring the aircraft back toward level flight by moving fuel from the heavier side to the lighter side. Transferring fuel from the tank on the high side to the tank on the low side reduces the lateral weight difference, which directly lessens the roll tendency and stabilizes the aircraft.

So, when the imbalance surpasses the limit, the system or procedure directs fuel to flow into the lower tank first. This means the low tank starts to fill while the high tank drains, moving the center of gravity toward the center and restoring safe handling. If more balancing is needed after that initial transfer, the process continues until within acceptable limits.