For takeoff, crossflow must be configured in which state?

For takeoff, crossflow must be configured in which state?

• A. Off
• B. On
• C. Armed
• D. Locked

Answer: (A)

Crossflow is the mechanism that transfers fuel between the left and right wing tanks. During takeoff, keeping crossflow Off ensures each engine is fed from its own wing tank, preserving a clean, symmetric fuel distribution as thrust ramps up. This prevents any unintended fuel transfer from upsetting the aircraft’s center of gravity or fuel balance right when the airplane is most sensitive to imbalance. Once the aircraft is climbing and fuel burn rates are more predictable, crossflow can be used later to balance tanks as needed.

Crossflow is the mechanism that transfers fuel between the left and right wing tanks. During takeoff, keeping crossflow Off ensures each engine is fed from its own wing tank, preserving a clean, symmetric fuel distribution as thrust ramps up. This prevents any unintended fuel transfer from upsetting the aircraft’s center of gravity or fuel balance right when the airplane is most sensitive to imbalance. Once the aircraft is climbing and fuel burn rates are more predictable, crossflow can be used later to balance tanks as needed.