How does the automatic cross-flow function operate?

The automatic cross-flow function is designed to maintain balanced fuel loads between tanks for optimal aircraft performance and safety. The correct answer indicates that the system activates when the fuel level in one tank is 200 pounds lower than the other tank. It continues the transfer of fuel until the amount in the lower tank rises to a specific threshold, stopping the transfer when there is a 50-pound difference in fuel levels between the tanks.

This function is essential in aviation as it ensures that the aircraft maintains a level center of gravity and enhances stability during flight. The specified tank differentials (200 pounds low and stopping at 50 pounds) ensure that fuel is transferred efficiently while preventing over-correction or excessive movement of fuel that could lead to instability or imbalance.