Definition
Small, localized wrinkles or raised areas in aircraft fabric covering or sheet metal skin, where the material has gathered or bunched instead of lying flat and smooth across the underlying structure.
Plain English
Little wrinkles or bumps in the surface of an aircraft's covering where the material isn't lying flat the way it should.
Context Anchor
Seen during fabric-covering work, fabric repairs, and preflight or maintenance inspections of fabric-covered aircraft.
Derivation
From the older English word 'pucker,' meaning to draw or gather into small folds. The same word is used for the small wrinkles that appear in fabric, paper, or skin when it bunches up. In aviation it kept that everyday meaning and was applied to aircraft surfaces.
Why Pilots Care
High puckers indicate elevated stress that can impair clear thinking and decision-making.
Analogy
Like a shirt seam that has been sewn too tightly, the fabric may gather into small wrinkles instead of lying flat.
Intuition Check
Do not read puckers as just harmless cosmetic wrinkles. On aircraft fabric, puckers can be a sign of uneven tension or a problem with the covering work.
Example Sentence 1
During the annual inspection, the mechanic noted several puckers in the fabric covering on the upper wing surface.
Example Sentence 2
Veteran pilots often laugh about their puckers after a tight engine-out practice session.