Definition
A small reinforcement patch made of fabric strips with frayed or unraveled ends, used to repair a tear or hole in aircraft fabric covering. The frayed strands are blended into the surrounding fabric weave with dope so the repair bonds smoothly into the original surface rather than leaving a hard edge.
Plain English
A fabric patch with stringy, finger-like edges that blend into the original fabric covering of an aircraft when glued down, making the repair almost invisible.
Context Anchor
Seen in aircraft fabric covering and fabric repair work, especially when repairing areas that are not flat.
Derivation
Called a 'finger patch' because the loose threads at the edges of the patch look like little fingers reaching out to grip and blend into the surrounding fabric.
Why Pilots Care
Pilots who own or fly fabric-covered aircraft should recognize the term so they can understand maintenance write-ups and inspect repairs intelligently. A properly made finger patch is a sign of good craftsmanship; a hard-edged patch is not.
Analogy
It is like cutting small slits in the edge of wrapping paper so it can fold neatly around a rounded object instead of bunching up.
Intuition Check
A finger patch is not a quick tape patch or a bandage-style cover. In this use, the “fingers” are part of the patch shape so the repair can fit smoothly over a curved or uneven area.
Example Sentence 1
The mechanic used a finger patch to repair the small tear in the Piper Cub's wing fabric.
Example Sentence 2
After trimming the damaged area, the mechanic selected a finger patch sized to overlap the edges by at least one inch on all sides.