TM 1-1520-238-23
Change 6
11-991
11.232.
DIRECTIONAL CONTROL SYSTEM INSPECTION – continued
11.232.4. Tail Rotor Swashplate Inspection
a. Perform tail rotor swashplate inspection.
(1) Visually check the non-rotating swashplate clevis lugs for any evidence of cracking, especially in the areas
of the six attaching bolts.
(a) If separation is present, rebond or replace washer (para 11.262).
(2) Non-rotating swashplate inboard and outboard sleeve bearing inspection.
(a) If swashplate assembly has not been removed, disconnect nonrotating swashplate from bellcrank
(para 11.262). Move swashplate axially on static mast.
(b) Inspect the static mast for unusual local discoloration, scratches, or discontinuity in the finish on the
static mast where the swashplate inner and outer sleeve bearings travel.
(c) If this is noted, wipe the static mast with a cheese cloth (item 51, App F) and methyl propyl ketone
(item 125A, App F).
(d) Remove swashplate assembly (para 11.262). Inspect non-rotating swashplate inboard and outboard
sleeve bearings for liner debonding, folding, tearing, or wear through to metal.
(e) Measure non-rotating swashplate inboard and outboard sleeve bearings inside diameter at 3 places
60 degrees apart. Replace non-rotating swashplate if measurement is greater than 4.767 INCHES in
diameter.
(f) Clean inboard and outboard sleeve bearings by lightly scrubbing bearing surfaces. Use pad (item 130,
App F).
(g) Wipe inboard and outboard sleeve bearings surfaces to remove any pad residue with cheese cloth
(item 51, App F) and methyl propyl ketone (item 125A, App F).
(h) Reinstall swashplate assembly (para 11.262).
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