TM 55-1520-240-23-4
5-66.2
REPAIR TITANIUM NOSE CAP CRACKS (AVIM)
(Continued)
5-66.2
6.
Inspect cap (3) for unbonding along edge of
crack. If bond void is found, flush with acetone
and rebond (Task 5-66.1).
7.
Inspect repair area (10). If more than 5 percent
of titanium is bare, prime area as follows:
Primer (E291.1) is toxic. Avoid
inhaling. Use only with adequate
ventilation. In case of contact,
immediately flush skin or eyes with
water for at least 15 minutes. Get
medical attention for eyes.
a.
Mix primer (E291.1). Mix 4 parts by volume
of primer base with 1 part by volume of
curing solution.
b.
Apply a thin film of primer (E291.1) to the
repair area. Use cheesecloth (E112).
Do not exceed 160ºF (71ºC). Higher
temperature can damage fiberglass.
c.
Cure repair at 140º - 160ºF (60º - 71ºC)
for 2 hours. Use heat lamps. Monitor
temperature. Use temperature indicating
strips (E413). If heat lamps are not available,
cure for 12 hours at 70ºF (21ºC).
8.
Cut piece of scrim cloth (E325) (11) 1/8 inch
larger than doubler (8) on each edge.
Adhesive (E43) is toxic. It can
irritate skin and cause burns. Avoid
inhaling. Use only with adequate
ventilation. Avoid contact with skin,
eyes, or clothing. In case of contact,
immediately flush skin or eyes with
water for at least 15 minutes. Get
medical attention for eyes.
9.
Mix 3 ounces of prepackaged adhesive (E43).
Follow manufacturer’s instructions. Mix until
color is uniform light grey. Go to step 11.
10.
If prepackaged adhesive is not available, mix
adhesive (E43) as follows:
a.
Mix 5 parts by weight of base (white) with 7
parts by weight of hardener (gray).
5-313
