TM 1-1520-238-23
Change 2
5-142.3/(5-142.4 blank)
5.29A.
MAIN ROTOR PITCH HORN WASHER REPLACEMENT (AVIM) – continued
5.29A.6. Installation
a. Prepare surface of washer (1) and pitch horn
(2).
(1) Lightly sand pitch horn (2) washer mating sur-
face. Use cloth (item 48, App F).
(2) Lightly sand surface of washer (1). Use cloth
(item 48, App F).
(3) Wipe pitch horn (2) washer mating surface
clean. Use methyl ethyl ketone (item 124,
App F) and cloth (item 51, App F).
(4) Apply a light, even coat of primer to mating
surface of pitch horn (2). Use primer
(item 143, App F).
(5) Allow to air dry at room temperature for 30
MINUTES.
b. Install washer (1) on pitch horn (2).
(1) Apply an even coat of adhesive to mating
surfaces of washer (1) and pitch horn (2). Use
adhesive (item 2, App F).
(2) While adhesive is still wet, install washer (1)
on pitch housing (2) and hand tighten clamp.
Use C clamp.
(3) Wipe excess adhesive squeeze-out from pe-
rimeter of washer (1). Use cloth (item 51,
App F).
(4) Allow adhesive to cure for 24 HOURS at room
temperature.
c. Remove C clamp from pitch horn (2).
d. Check washer (1) inner and outer ring area for
air bubbles around washer. None allowed.
e. Inspect (QA).
END OF TASK
M04-5126-2
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M04-5126-3
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