Definition
A door that is hinged at the top of the cabin or fuselage and opens by swinging upward and outward, rather than swinging out sideways or sliding. On aircraft so equipped, the door must usually be propped open or held open by a strut while occupants enter or exit, and care is needed near the propeller arc when the door is open during start.
Plain English
A door that lifts upward instead of swinging out to the side, like a wing folding up away from the body of the aircraft.
Context Anchor
Seen during cockpit entry, passenger boarding, preflight checks, and before-start procedures on some light airplanes.
Derivation
Named after the way a seagull's wing lifts upward from its body. The door's hinge along the top edge makes it rise the same way a gull lifts its wings, which is why the name stuck.
Why Pilots Care
Allows easier cockpit access on low-wing airplanes and reduces the chance of the door striking the ground or nearby objects.
Analogy
Functions like the upward-opening doors on certain sports cars, swinging high overhead rather than out to the side.
Intuition Check
A gull-wing door is not part of the airplane’s wing. It is a cabin door named for the wing-like shape it makes when opened upward.
Example Sentence 1
Before engine start, the pilot confirmed both gull-wing doors were fully closed and latched.
Example Sentence 2
The gull-wing door stayed raised while the pilot performed the pre-start checklist on the ramp.