If wing tank overpressure occurs and the respective transfer switch is in AUTO, what happens to the transfer pump?

• A. It shuts down
• B. It speeds up
• C. It continues as normal
• D. It trips and locks out

Answer: (C)

In AUTO, wing-tank transfer pumps are controlled by the fuel management logic to move fuel as needed for balance and engine feed. If wing-tank overpressure occurs, the system handles that pressure with the wing-tank vent/relief path, not by stopping or altering the pump operation. So the transfer pump continues to run as commanded in AUTO, while pressure relief vents excess pressure. The pump isn’t automatically shut down, sped up, or tripped by the overpressure condition; those protections are managed by the tank’s relief system and the normal AUTO control logic.