Repair Of Fiberglass Components - Beechcraft TRAVEL AIR 95 Shop Manual

REPAIR OF FlBERGLASS
COMPONENTS WARNING
Large holes and cracks
require
that the damaged area be cut In preparing
resin never
mix DDM peroxide and
and trimmed
just beyond
the
area
of noticeable
damage.
If
cobalt together, as this will
result
in
a
the parts are painted
remove paint and sand area
at
least two
spontaneous fire. Always add one catalytic
inches beyond the edge of the cutout. Then prepare three
agent to the
resin
and mix thoroughly before
patches of laminated glass cloth,
Specification MIL-F-9084,
adding the other agent.
preferably No. l81
fabric. One
patch should be the size of
the sanded area, the
second
patch should
be
smaller so that
approximately
one-half
inch of the
first
patch will be Apply an even coat of resin to the sanded area. Impregnate
exposed.
Cut
the third
patch
to approximately
one-half inch
all three
laminated
glass cloth patches by laying
the
patches
smaller than the second patch. Prepare a sufficient amount on clear paper and
working
the resin through the
fabric
with
of
resin,
MIL-R-7575
which
can be used in thirty minutes, a 2 inch
brush. Place
the large patch over the cutout area,
in accordance with
the manufacturer's instructions.
Never
working
out
all air bubbles and wrinkles.
If the cutout
is
use
catalytic resin
which
has been
exposed
to air more than large
enough to cause
the patch to sag, place a suitable
thirty minutes. If the
repair
is large, prepare small amounts
support coated
with
automobile wax or waxed paper behind
of resin as
required.
Make sure that your
hands are clear of
the
repair
area to prevent
the
resin
from
adhering to the
oil, grease and
dirt.
support.
Apply the second patch over the
first
patch
working
out all wrin'kles and air
bubbles.
Apply the third patch over
NOTE the second patch in the same manner. After all three patches
have
been applied,
brush
the area
with
an even coat of
resin.
There are several different resins
available Let the patches cure for a period of 24 hours at temperatures
which will
cure
when
exposed to air
and
at
room
of
23°C
(75°F) to
66°C (150°F).
With
fine
sandpaper, smooth
temperature. Two are suggested,
American
the patch area
for desired finish.
Repaint the finished area
Cyanimide, Laminac
4116,
blended
100 parts
with matching paint.
resin to 1/2 to I part of
DDM peroxide. or
Gliddens
1001
resin
blended 100 parts resin to
l/2 part cobalt
with
1/2 to l part DDM peroxide.
Both resins conform to specifications
MIL-R-
7575
and
MIL-P-8013.
C3
5-23