TM 55-1520-240-23-4
5-75
REPAIR ROTARY-WING BLADE TRIM TAB
(Continued)
5-75
NOTE
Refinishing is required only when
existing finish has been marred by
the repair.
2.1.
Determine the finish system used on the rotor
blade (TM 55-1500-344-23).
a.
For rotor blades without 58 proceed to step
3.
b.
For rotor blades with 58 proceed to Task
2-350.1.
3.
Refinish the repair area as follows:
a.
If finish was marred during repair, lightly
sand the area. Use abrasive paper (E9).
Remove sanding residue. Use a clean dry
cloth (E120).
Naphtha (E245) is combustible and
toxic. It can irritate skin and cause
burns. Use only with adequate
ventilation away from open flame. In
case of contact, immediately flush
skin or eyes with water for at least
15 minutes. Get medical attention
for eyes.
Do not soak blade with solvent. Use
damp cloths only. Use only aliphatic
naphtha TT-N-95 (E245).
b.
Wipe the surface. Use clean cloths (E120)
damp with naphtha (E245). Wipe dry before
naphtha evaporates, use clean dry cloth
(E120). Wear gloves (E184.1).
Epoxy primer (E292.1) is flammable
and toxic. It can irritate skin and
cause burns. Use only with adequate
ventilation away from heat or open
flame. 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.
c.
If bare metal is exposed, mix epoxy primer
(E292.1) according to manufacturers
instructions.
d.
Apply primer (E292.1) in a thin mist coat.
Allow to dry at least 1 hour.
Lacquer (E225) is extremely
flammable. It can be toxic. Keep away
from heat, sparks, or open flame. In
case of contact, immediately flush
skin or eyes with water for at least
15 minutes. Get medical attention
for eyes.
Thinner (E418) is flammable and toxic.
It can irritate skin and cause burns.
Use only with adequate ventilation
away from heat or open flame. 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.
e.
Thin lacquer (E215) with thinner (E418) in
accordance with manufacturers instructions.
f.
Apply 2 coats of lacquer (E215) to the repair
area. Allow at least 45 minutes between
coats.
g.
If necessary restencil trim tab angle (XºUP or
XºDOWN) and DO NOT BEND. Use 1/2 inch
high letters. Use lacquer (E225) thinned with
thinner (E418).
FOLLOW-ON MAINTENANCE:
Check trim tab angle (Task 5-75.1).
END OF TASK
5-428