TM 55-1520-240-23-4
5-97.2
INSPECT PITCH LINK WITH ELASTOMERIC BEARINGS ON HELICOPTER
(Continued)
5-97.2
2.
Check for bond looseness in lower bearing (4).
3.
Remove bolt (5) securing pitch link to swashplate
(6) (Task 5-97).
4.
Remove pitch link rod end bearing (4) from
swashplate (6).
NOTE
The elastomeric bearing is bonded to
the pitch link lower end. If the bearing
is found to be unacceptable, replace
the entire rod end.
5.
Inspect the elastomeric rod end bearing (4) as
follows:
a.
Try to rotate ball (7) by hand. If the ball
rotates, it indicates complete unbonding.
Reject the bearing.
NOTE
If shim is covered by elastomeric
material, the bearing is acceptable.
Evidence of dust-like particles of
elastomeric material or evidence of
small particles breaking away from
the surface of the elastomeric material
are not causes for rejection.
b.
Check if shim (8) is visible. If it protrudes
above elastomeric material (9), reject the
bearing if any of the following conditions exist:
(1)
Protrusion of shim above plane of bearing
housing (10).
(2)
Unbonding of shim from elastomeric
material.
NOTE
On certain bearings, shims are
installed in two pieces. A split
between the shim halves is normal.
(3)
Broken shim. Check with a feeler gauge
or similar tool.
6.
Replace rod end if found unacceptable, and
adjust rod end length (Task 5-98).
7.
If bearing is acceptable, reconnect pitch link rod
end to swashplate (Task 5-99).
FOLLOW-ON MAINTENANCE:
None
END OF TASK
5-591
