Fuel XFeed must be selected __ during takeoff and landing.

Fuel XFeed must be selected __ during takeoff and landing.

• A. ON
• B. OFF
• C. AUTO
• D. MANUAL

Answer: (B)

Crossfeed lets fuel be drawn from the opposite wing’s tank to feed an engine. During takeoff and landing, keep crossfeed OFF so each engine remains fed from its own wing tank, keeping fuel delivery isolated and predictable when power demands are changing quickly. If crossfeed were allowed to operate in these phases, a pump or valve failure could cause unwanted fuel transfer between wings, creating an imbalance or risking engine fuel starvation right when symmetric thrust and precise handling are most critical. The fuel management system can still manage balance through transfers and center-tank usage without relying on crossfeed. Modes that would enable automatic or manual crossfeed could introduce unwanted flow during these high-workload phases, so the safe practice is to leave it OFF.

Crossfeed lets fuel be drawn from the opposite wing’s tank to feed an engine. During takeoff and landing, keep crossfeed OFF so each engine remains fed from its own wing tank, keeping fuel delivery isolated and predictable when power demands are changing quickly. If crossfeed were allowed to operate in these phases, a pump or valve failure could cause unwanted fuel transfer between wings, creating an imbalance or risking engine fuel starvation right when symmetric thrust and precise handling are most critical. The fuel management system can still manage balance through transfers and center-tank usage without relying on crossfeed. Modes that would enable automatic or manual crossfeed could introduce unwanted flow during these high-workload phases, so the safe practice is to leave it OFF.