TM 1-1520-238-23
Change 6
5-44.17
5.7A.
MAIN ROTOR BLADE SPAR TO SPAR DEBOND REPAIR (AVIM) – continued
CAUTION
The surface temperature of the blade
must not exceed 190 F (87.8 C) or
blade debonding and/or paint blistering
may result.
NOTE
Do not apply power to bonding tool heat-
er until the pot life of the adhesive has
expired.
v. Apply heater power to tool (7).
(1) Position the BOND HEATER SELECT switch
(30) to TOP or BOTTOM heater.
(2) Position the HEATER POWER switch (20) to
ON (controller L1 output light will illuminate).
w. Perform bonding cure cycle.
(1) After heater reaches 180 F (88.2 C) 5,
note time and cure adhesive for 90 MIN-
UTES.
CAUTION
To ensure a good bond, do not apply ex-
cessive pressure.
x. Apply pressure to debonded spar (2) repair
area.
(1) Install pressure block over debonded spar (2)
repair area, ensuring rubber pad is on side
facing repair. Use pressure blocks (Figure
D-478, App D).
(2) Place C-clamps into position over pressure
block every 2 to 3 INCHES. Use C clamp(s).
(3) Apply pressure evenly, tightening C-clamps
1/2 turn after contact.
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M04 5206 32
30
20
7
2
M04-5206-55
