What is the function of fuel crossfeed on the A320?

• A. Crossfeed drains fuel from tanks to vent.
• B. Crossfeed transfers fuel to the landing gear.
• C. Crossfeed allows drawing fuel from one wing tank to feed an engine or to balance fuel between tanks, aiding in pump or balance issues.
• D. Crossfeed heats fuel for efficiency.

Answer: (C)

Fuel crossfeed connects the left and right wing fuel systems so fuel can be drawn from either wing to feed an engine, and it can also move fuel between tanks to balance the distribution. This provides redundancy if an engine’s fuel pump or line on one side is inoperative, because fuel can be taken from the opposite wing to continue feeding that engine. It also helps maintain the proper center of gravity by equalizing fuel between the tanks as consumption or leakage creates an imbalance. It’s not about venting, it doesn’t feed the landing gear, and it doesn’t heat fuel—its purpose is flexible routing of fuel for engine feed and tank balance.