TM 1-1520-238-23
5-44.6
Change 6
5.7A.
MAIN ROTOR BLADE SPAR TO SPAR DEBOND REPAIR (AVIM) – continued
(4) Lift and brace the debonded outer spar sur-
face open. Use depressor (item 70, App F).
NOTE
Ensure solvent is applied in all areas
where wedging material is located by
moving wedging material as you go.
(5) Apply solvent liberally between mating sur-
faces of repair, moving from one end of repair
to the other. Use applicator bottle and methyl
ethyl ketone (item 124, App F).
(6) Wipe mating surfaces of repair area with lint
free cloth. Use cloth (item 52, App F).
(a) Pull cloth between spar mating surfaces.
Use chip breaker or equivalent.
(7) Visually inspect cloth for evidence that sur-
faces are clean of dirt and debris.
(8) Repeat steps (5) thru (7) (application of sol-
vent starting from opposite end of repair) until
surfaces are clean of dirt and debris.
(9) Remove and discard wedging material.
(10) Allow to dry at room temperature for 1 HOUR
minimum.
NOTE
Step (3) only applies for repairs of spar
debonds located at the outboard tip end
of the blade.
f. Mask around debonded spar (2) surface.
(1) Mask repair area on both sides of spar to spar
joint, less the joggle area of the aft side of the
spar to spar joint seam.
(2) Mask approximately 6.0 to 12.0 INCHES
wide from center of repair area. Masking
should extent past both ends of the spar de-
bond by at least 2.0 INCHES. Use tape
(item 204A, App F).
(3) Cover balance weight studs (5) to protect
them from adhesive squeeze-out. Use tape
(item 204A, App F).
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M04 5206 10
2
2
TAPE
TAPE
5
TAPE
SPAR
JOINTTAPE
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