Definition
The act of moving fuel from one tank to another during flight, either by selecting a different tank to feed the engine or by using a pump system to physically move fuel between tanks to maintain balance, manage weight distribution, or ensure usable fuel reaches the engine.
Plain English
Moving fuel from one tank to another while flying, usually to keep the airplane balanced or to make sure the engine keeps getting fuel.
Context Anchor
Seen during cruise fuel management, especially in airplanes with more than one fuel tank or with procedures for moving fuel between tanks.
Derivation
Transfer comes from Latin words meaning “to carry across.” That helps here because fuel transfer is not about making fuel or measuring fuel; it is about carrying or moving fuel across the airplane’s fuel system.
Why Pilots Care
Maintains lateral balance, keeps the center of gravity within limits, and prevents fuel starvation in the selected tank.
Intuition Check
Fuel transfer does not always mean the engine is burning that fuel right now. It means fuel is being moved within the airplane’s fuel system.
Example Sentence 1
During cruise, the pilot performed a fuel transfer by switching from the left tank to the right tank to keep the airplane balanced.
Example Sentence 2
After noticing a left-wing-heavy condition, the crew performed a fuel transfer to equalize the tanks before continuing to destination.