When does the bi-directional XFLOW pump activate?

The bi-directional XFLOW pump activates when the fuel imbalance reaches 200 pounds. This system is designed to balance the fuel load between the left and right tanks to maintain aircraft stability and performance. When the imbalance reaches this specific threshold, the pump engages to transfer fuel from the tank with the higher fuel quantity to the tank with the lesser quantity, this is critical during flight operations to ensure optimal weight distribution and operational efficiency.

Operational parameters like a 100-pound balance threshold or lower levels of fuel capacity are not the triggers for the pump activation, as they occur either too early in the imbalance or are related to different aspects of fuel management. The low tank capacity scenarios focus on maintaining fuel levels above certain percentages for adequate power without directly influencing the activation of the XFLOW pump based on imbalance.