TM 1-1500-204-23-11
Air pressure must not exceed 20 psi if delam-
inations exist in area of honeycomb core. Air
Monitor the repair area temperature to avoid
pressure of 40 psi may be applied to delami-
excessively heating it, as excessive heat can
nations between mating skins or between skin
shorten the pot life of the resin and may
plies not in area of honeycomb core.
cause it to exotherm. Consult the system
speciic technical manual or engineering for
Fit injection nozzles into the holes
1
the proper heating temperature.
at each end of the delamination.
Tape over the intermediate holes
(i)
Heat the delaminated area using a heat
with lash breaker tape.
lamp as described in paragraph 6-19h
to the temperature listed in the system
Attach a piece of tubing to one noz-
2
speciic technical manual. Monitor tem-
zle and submerge the other end in
perature to ensure the maximum tem-
a container of water.
perature limit is not exceeded.
Attach other nozzle to sealant gun
3
cartridge without plunger and place
cartridge in sealant gun. Attach a
regulated source of compressed air
Reduced strength will result if the incorrect
to sealant gun.
mix ratio is used, if an excessive amount
of air is introduced into the adhesive during
Apply pressure with air regulator
4
mixing, or if mixing is inadequate and may
set for 20 psi through sealant gun
result in loss of structural integrity.
into the delamination.
Pressure must be applied to adhesive within
Check water for bubbles to make
5
the pot life of the resin. For ambient temper-
sure airlow exists. If airlow exists
atures in excess of 90 F, decrease this time
go to step vii below. If airlow does
by 50%. An unsatisfactory repair will result
not exist, go to step 6 and step 7
if the resin gels before adequate pressure is
below.
applied and may result in loss of structural
integrity. Select and prepare a heat blanket
Tape over existing holes and rein-
6
(if required) and all necessary vacuum bag
spect using NDI to map delami-
materials prior to mixing resin.
nated area.
NOTE
Repeat steps d-f above. If airlow
7
Refer to paragraph 6-17, Resin Preparation
still does not exist, proceed to para-
and Use, for the proper measuring and mixing
procedures.
(g) Remove nozzle and tape from holes.
(j)
Prepare the amount of resin required
to ill the delaminated/repair volume.
(h) Dry the repair area as described in para-
Prepare the adhesive per paragraph
graph 6-6 for a minimum of 1 hour or as
directed by the system speciic techni-
cal manual, at 150 (10) F using a heat
lamp or other suitable heat source.
(k) Inject Adhesive. (See igure 7-36).
7-61
