TM 1-1520-238-23
Change 6
5-113
5.23.
MAIN ROTOR DAMPER REMOVAL/INSTALLATION – continued
5.23.4. Cleaning
a. Wipe damper and mating surfaces. Use cloth (item 52, App F).
b. Clean corrosion preventive compound from removed hardware. Use dry cleaning solvent (item 74,
App F).
5.23.5. Inspection
NOTE
The two bolts through the plate section of the damper assembly may show looseness, particularly at
low temperatures. This is a normal condition, not a defective condition, and no corrective action is
required. Rotational movement is allowed.
a. Check link, damper, and trunnion for cracks. None allowed.
b. Check trunnion for nicks, gouges, scratches, scoring, and galling.
(1) Less than 0.010 INCH is acceptable.
(2) Superficial scratches are acceptable if no material is raised above surrounding surface.
c. Check trunnion for the following:
(1) Wear limit on damper to trunnion attachment. Maximum allowable radial play 0.010 INCH.
(2) Wear limit on trunnion to pitch housing. Maximum allowable radial play 0.010 INCH.
(3) There shall be no evidence of teflon debonding.
(4) Check damper, trunnion, bushing, and angle bracket for corrosion (para 1.49). Maximum depth 0.005
INCH.
d. Check elastomeric material on edge of damper for tears or delaminations.
(1) Tears or delaminations along outer or inner ends of damper are acceptable if they have not spread apart
along the upper or lower edges.
(2) Tears or delaminations along upper or lower edges of damper totaling more than four inches require
replacement of damper.
e. Inspect rod end (para 5.24).
f. Inspect link (para 5.33).
g. Inspect nuts for damage.
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