Definition
A reinforcing strip of fabric placed under rib lacing or along high-stress areas of a fabric-covered aircraft to prevent the covering material from tearing where it is stitched, glued, or repeatedly stressed.
Plain English
A protective strip of fabric laid down first so that the stitching or glue holding the aircraft's outer fabric in place doesn't tear through it over time.
Context Anchor
Seen in fabric-covered aircraft maintenance, especially when inspecting or repairing wing, tail, or fuselage fabric covering.
Derivation
Literally 'anti-' (against) plus 'tear strip' — a strip used against tearing. Named for exactly what it does.
Why Pilots Care
Maintains the airworthiness of fabric-covered aircraft by limiting damage that could otherwise compromise structural strength or aerodynamic surfaces.
Analogy
Like the reinforced patch sewn behind a button on a shirt — the button itself doesn't pull through the fabric because there's extra material backing it up.
Intuition Check
Do not think of an antitear strip as a temporary piece of tape placed over a rip. In aircraft fabric work, it is a reinforcing fabric strip installed to help prevent a tear from spreading.
Example Sentence 1
Before lacing the fabric to the wing ribs, the technician applied an antitear strip along each rib to protect the covering.
Example Sentence 2
After a small hail dent, the technician added an antitear strip inside the wing to keep any future tear from spreading across the surface.