TM 55-1520-240-23-4
5-75
REPAIR ROTARY-WING BLADE TRIM TAB (Continued)
5-75
j.
Wipe surfaces of doubler (6) with cloth (E120)
damp with acetone (E20). Wipe dry before
acetone evaporates. Wear gloves (E184.1).
Set doubler (6) and scrim cloth (7) aside for
bonding.
k.
Mix a small amount of adhesive (E43 or
E47.1) as follows:
WARNING
Adhesive (E43 or E47.1) is toxic. It
can irritate skin and cause burns.
Avoid inhaling. Use only with
adequate ventilation. Avoid contact
with skin, eyes, or clothing. In case
of contact, immediately flush skin
or eyes with water for at least 15
minutes. Get medical attention for
eyes.
(1)
If adhesive (E43) is used, mix 5 parts of
white base and 7 parts of gray hardener.
Use trip balance. Stir in polyethylene cup
(E157) with wood spatula (E424) until
color is uniform. Wear gloves (E184.1).
(2)
If adhesive (E47.1) is used, mix equal
parts of adhesive (E47.1) and curing
agent (E158.1). Use trip balance. Stir
in polyethylene cup (E157) with wood
spatula (E424) until color is uniform.
Wear gloves (E184.1).
(3)
For adhesive (E41), combine part A
(100 parts/weight) of resin and part B
(22 parts/weight) of hardener. Use trip
balancer. Mix in polyethylene cup (E157)
until color is uniform. Use wood spatula
(E424). Wear gloves (E184.1).
NOTE
Working life of adhesive (E43 or
E47.1) is about 30 minutes.
l.
Work adhesive (E43 or E47.1) into the bond
void. Use a piece of clean 0.005 inch shim
stock. Apply a coat of adhesive to the
outlined area.
m.
Position scrim cloth (7) on the adhesive. Coat
doubler (6) with adhesive (E43 or E47.1)
and position it on the outlined area. When
properly positioned, press doubler onto scrim
cloth.
Change 2
5-425
