TM 55-1520-240-23-4
5-137.1
REPAIR COMPOSITE WEATHER-PROTECTIVE COVER (AVIM)
(Continued)
5-137.1
PUNCTURE THROUGH BOTH SKINS AND CORE (UP
TO 2 SQUARE-INCHES)
76.
Outline area of puncture (28) on both sides of
cover (1) with a circle or oblong. Use pencil
compass and straightedge.
NOTE
Do not sand into glass fibers.
Complete removal of primer is not
necessary.
77.
Remove finish down to primer from an area on
both sides of cover (1) 1.5 inches larger in all
directions than outline. Use abrasive paper (E8).
Use cloths (E120) damp with acetone (E20) as
needed to soften finish. Wear gloves (E186).
78.
Cut out punctured skin and core plug (29). Work
from both sides of cover (1) as needed. Use
craftsman’s knife.
79.
Cover cutout (30) on top of cover (1). Use nylon
tape (E390.1) (31).
80.
Prepare mixture of adhesive. (Refer to steps 105
thru 108.) Fill cutout (30) from bottom of cover
(1) to bottom surface (32) with adhesive (33).
Do not heat cover surface over 160ºF
(71ºC). Higher temperatures can
damage cover.
81.
Cure adhesive at 140º - 160ºF (60º - 71ºC) for 2
hours. Use heat lamp. Monitor temperature with
temperature indicating strips (E413).
NOTE
Serviceable cure can be achieved
without heat at 70º - 80ºF (21º - 27ºC)
in 24 hours.
82.
Remove tape (31). Fair cured adhesive to cover
surface on top and bottom of cover (1). Use
abrasive paper (E9).
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