Definition
Vertical structural partitions inside an aircraft fuselage that divide it into sections and provide rigidity, helping carry loads and maintain the shape of the airframe.
Plain English
Internal walls inside the fuselage that give the aircraft its shape and strength, much like the internal walls of a building.
Context Anchor
Seen in airframe structure discussions, maintenance records, and inspections of the aircraft body.
Derivation
From the old nautical term for upright partitions inside a ship's hull. Aircraft borrowed the word because the role is the same: walls inside the structure that divide it into compartments and add strength.
Why Pilots Care
Bulkheads are essential to keeping the fuselage from deforming, directly affecting structural integrity and flight safety.
Intuition Check
Do not think of a bulkhead as just an interior cabin wall or baggage divider. In aircraft structure, a bulkhead is a load-carrying part that helps support and shape the aircraft body.
Example Sentence 1
The mechanic inspected the rear bulkhead for cracks before signing off the annual inspection.
Example Sentence 2
After the hard landing, the mechanic checked the bulkheads for any distortion or cracking.