What is the purpose of crossfeed in the fuel system, and how does it relate to balance?

• A. Crossfeed allows fuel transfer between left and right wing tanks to balance fuel and center of gravity within limits.
• B. Crossfeed transfers bleed air between packs.
• C. Crossfeed dumps fuel to atmosphere.
• D. Crossfeed balances electrical load.

Answer: (A)

Crossfeed in the fuel system is about moving fuel between the left and right wing tanks so you can keep the fuel balance and the center of gravity within allowable limits. When one side has more fuel or when you need to keep an engine fed while its own tank is low or a pump on that side is out, crossfeed lets fuel be transferred to even things up. This helps maintain stable handling and ensures the CG stays inside the approved envelope through all phases of flight and during engine-out conditions. It’s not about transferring bleed air, dumping fuel to the atmosphere, or balancing electrical loads, which are functions of other systems.