TM 1-1520-238-23
5-44.4
Change 6
5.7A.
MAIN ROTOR BLADE SPAR TO SPAR DEBOND REPAIR (AVIM) – continued
c. Clean surfaces of main rotor blade (1).
(1) Apply flashbreaker tape over center of seam
of repair. Use tape (item 203A, App F).
(2) Clean surface of repair area at least 6.0
INCHES in all directions. Use methyl ethyl
ketone (item 124, App F) and cloth (item 51,
App F).
(3) Remove tape from spar (2) repair area.
CAUTION
To prevent damage to main rotor
blade, do not lift debonded spar more
than 0.080 INCH.
To prevent damage to main rotor
blade, do not wedge material/tooling
more than 0.50 INCH underneath spar
or from end of repair.
NOTE
If spar debond ends within 6.0 INCHES of
the outboard tip end, debond remaining
6.0 INCHES of spar.
d. Remove adhesive from between mating sur-
faces of debonded spar (2).
(1) Mark off tools for 0.50 INCH. Use tape
(item 203A, App F).
(2) Debond mating surfaces over length of repair.
Use putty knife.
(3) If required debond remaining 6.0 INCHES of
debonded spar only if debond ends within 6.0
INCHES of outboard tip.
(4) Lift and brace the debonded outer spar sur-
face open at center of repair area. Use
depressor (item 70, App F).
(5) Remove adhesive or debris from between
spar mating surfaces. Use chip breaker or
hacksaw blade with a V-notch cut-out on non-
cutting edge side.
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TAPE
M04 5206 6
1
2
M04 5206 61
TAPE
0.50 IN.
2
M04 5206 7
2
M04 5206 62
6 .0 IN.
AREA OF DEBOND
