TM 1-1520-238-23
5-12
Change 3
5.1.
MAIN ROTOR INSPECTION – continued
o. Inspect electrical brush holder (21) for serviceability.
(1) Check electrical brush holder (21) for looseness. None allowed.
(2) Check electrical brush (23) for even contact with static mast (24).
(3) Check for electrical brush (23) contact with lower flange of bearing liner (18.1), refer to step n.
p. Check lead lag link upper and lower hub bearings (25) for serviceability.
(1) Check lead lag link hub bearings (25) in pitch housing (9) for looseness. None allowed.
(2) Check lead lag link hub bearings (25) for wear (para 5.32).
q. Inspect main rotor electrical leads (26) for serviceability.
(1) Check electrical leads (26) for broken wires. None allowed.
(2) Check electrical leads (26) for broken attaching lugs. None allowed.
r. Check electrical leads (26) attached to electrical brush holders (21) for slack.
(1) If leads (26) do not have any slack, then reseat lower oil seal retainer (22) in liner (18) (para 5.46A).
s. Inspect damper (27), rod end (28), and rod end bearing (29) for serviceability.
(1) Check damper (27) for tears or delamination of elastomeric material.
(a) If surface tears or delamination have spread out along inner or outer edges, or if upper or lower edges
of elastomeric material have tears or delamination exceeding FOUR INCHES, replace damper (27)
(para 5.23).
(2) Check rod end (28) for thread damage. None allowed.
(3) Check rod end (28) for corrosion (para 1.49).
(4) Check rod end bearing (29) ball for corrosion (para 1.49).
(5) Check rod end bearing (29) for wear.
(a) Radial play not to exceed 0.007 INCH.
(b) Axial play not to exceed 0.010 INCH.
t. Inspect main rotor blade (15) for serviceability.
(1) Check rotor blade (15) for loose attaching pins (30) (para 5.3).
(2) Check rotor blades (15) for corrosion (para 5.2).
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