TM 55-1520-240-23-4
5-66.2
REPAIR TITANIUM NOSE CAP CRACKS (AVIM)
(Continued)
5-66.2
i.
Operate vacuum pump. Smooth wrinkles in
polyvinyl sheet (23).
j.
Check for air leaks. Adjust sheeting (23) or
add sealing tape (E396) if needed.
k.
Clamp wooden blocks (24) on both sides of
blade trailing edge.
l.
Place cargo strap (25) around blade to
secure nose cap doubler. Position rubber
pads (26) to protect polyvinyl sheet (23) from
cargo strap buckle. Make pads (26) from
rubber sheet (E319).
m.
Tighten cargo strap (25) to fully seat repair
doubler on nose cap.
n.
Maintain 20 inches Hg minimum vacuum
during cure.
Do not exceed 160ºF (71ºC). Higher
temperature can damage fiberglass.
5-316
