TM 9-2350-261-34
REPAIR
c.
molding material parts.
WARNING
Welding on plastic molding
material produces
toxic
fumes and can poison you.
d.
Do not weld on plastic
Large dents may be removed by pushing
from either side, as required. Removal of
foam for access is permissible. Replace
foam, see foam repair below.
Repaint repaired areas of sheet metal.
Restencil warning on rear trim vane
flotation pod, if damaged. See
TM 43-0139 for paint requirements.
5. Repair polyurethane foam as follows:
4. Repair sheet metal as follows:
a.
b.
Small dents, scrapes, and punctures may
a.
be repaired by filling defect with metal
dent filler using instructions supplied with
filler. Sand smooth when dry.
b.
Cracks and holes may be repaired as fol-
lows: Drill a 0.187 inch (5 mm) hole at
end of all cracks, if possible. Make a
patch from 0.125 (3 mm) inch thick alu-
minum sheet. Patch should extend beyond
the damaged area by at least 0.75 inch
(19 mm) in all directions. Secure patch
with rivets. Rivet holes should be
approximately 1 inch (25 mm) apart, and
be of appropriate size for either 0.094 inch
(2 mm) or 0.125 inch (3 mm) diameter
rivets. Patches shall not extend over more
than 10% of the surface area of the pod.
When required, remove foam in area to be
repaired with knife, chisel, saw, or similar
tool.
Place pods on a flat surface and clamp to
prevent bulging sheet metal. Fill voids
with plastic molding material (foam). Trim
off excess foam after it has cured. Foam
that has expanded from heat and age
should be trimmed off with saw or knife
or replaced as required. Repaired or
replaced foam should be flush within 0.06
inch (1. 5 mm) of edge of sheet metal
shell.
FOLLOW-THROUGH STEPS
1. Install trim vane or hull side flotation pods
on carrier (see your –20).
END OF TASK
8-24
