Definition
A long, lightweight structural member that runs lengthwise along an aircraft fuselage or wing, attached to the frames or ribs and to the skin. Stringers carry bending and axial loads and stiffen the skin so it does not buckle under flight and ground loads.
Plain English
A thin, long strip of metal or composite material that runs the length of the fuselage or wing on the inside, helping hold its shape and giving the outer skin something rigid to attach to.
Context Anchor
Seen in airframe structure, aircraft damage inspections, and maintenance descriptions of fuselages and wings.
Derivation
From the everyday word 'stringer' meaning a long piece that runs the length of a structure (also used in staircases and bridges). The aviation use keeps that same idea: a long member running lengthwise.
Why Pilots Care
Stringers are critical to airframe strength; cracks or corrosion in them can lead to structural failure if not repaired.
Analogy
Think of the long wooden slats running the length of a wooden boat hull on the inside, tying the cross-frames together and stiffening the planking. Stringers do the same job in an aircraft.
Intuition Check
A stringer is not a piece of string or cable. In an aircraft, it is a rigid structural support that runs lengthwise under the outer covering.
Example Sentence 1
The technician inspected the stringers along the lower fuselage for corrosion before approving the aircraft for return to service.
Example Sentence 2
Wing stringers transfer aerodynamic loads from the skin into the main spars.