TM 1-1500-204-23-11
9
Remove tape and squeeze out.
(w) Prepare a mixture of chopped ibers and
paste adhesive per paragraph 6-17,
Reduced strength will result if the incorrect
with mrF = 14. Fill in trailing edge with
mix ratio is used, if an excessive amount
mixture.
of air is introduced into the adhesive during
mixing, or if mixing is inadequate and may
(x) Repeat steps (v)1 through (v)8 for LML
result in loss of structural integrity.
surface.
Pressure must be applied to adhesive within
(y) Machine edges of skin spacer lush with
the pot life of the resin. For ambient temper-
part according to paragraph 6-8. (See
atures in excess of 90 F, decrease this time
igure 7-47, View F).
by 50%. An unsatisfactory repair will result
if the resin gels before adequate pressure is
(z) Install a vacuum bag over the patch
applied and may result in loss of structural
bond area per paragraph 6-18 except
integrity. Select and prepare a heat blanket
omit heat blanket and caul plate. Apply
(if required) and all necessary vacuum bag
a minimum of 20 inches of mercury
materials prior to mixing resin.
without audible leaks. If this cannot
be achieved, remove vacuum bag and
Prepare of adhesive as described
1
repair leaks by applying additional paste
adhesive to skin spacer/part surface
gap. Repeat leak check as required.
NOTE
(aa) Dry the repair area to remove subsur-
Use scrim cloth if required by the system
face moisture per paragraph 6-6. Use
speciic technical manual.
a heat blanket and vacuum bag as
described in paragraph 6-18.
2
Apply tape to outer side of skin
spacer to facilitate anchoring to
(ab) Cut UML and LML patches from the
parent skin.
patch material speciied in the system
speciic technical manual according to
3
Apply a thin layer of adhesive in
paragraph 6-8. Patch periphery should
patch bond area on UML surface of
extend onto part UML/LML surface a
part using a spatula and adhesive
constant distance beyond original dam-
comb, per paragraph 7-6. Extend
age cleanup edge to provide required
the adhesive 1/4 inch past the patch
patch overlap.
bond periphery.
(ac) Remove peel ply from both sides of
4
Apply a thin layer of adhesive in
patch if required. Use care to not inad-
patch bond area on UML surface of
vertently remove ibers from patch dur-
part using a spatula and adhesive
ing peel ply removal.
comb, per paragraph 7-6. Extend
the adhesive 1/4 inch past the patch
(ad) Taper edge of patches using a 90
bond periphery.
degree router motor and an 80 grit
sanding disk to the dimensions shown
Lay the skin spacer on top of rib
5
in igure 7-10.
spacer and splice plate, lush with
the parent skin. Anchor with tape.
(ae) Prepare patches and mating surface
of skin spacers for bonding by lightly
6
Tape release ilm over skin spacer.
hand sanding with 150-180 grit abra-
sive paper as described in paragraph
Apply pressure with caul plate and
7
6-7. Handle prepared surfaces wearing
shot bags as illustrated in igure
powder free latex gloves until patch
7-47, View E. Allow adhesive to set
bonding is complete. If patches are not
at room temperature for a minimum
to be bonded immediately, cover them
of 8 hours.
and the repair area with clean barrier
material and secure with tape to prevent
8
Remove caul plate and shot bags.
7-83
