TM 55-1520-240-23-4
5-115
CHECK SWASHPLATE BEARING FRICTION
(Continued)
5-115
f.
Close work platforms (12) (Task 2-2).
g.
Pull lanyard (13) on each of two blades (14)
and release two tiedown lines (15).
h.
Apply electrical power to the helicopter.
i.
Have pilot start engines and operate at ground
idle for 5 minutes (TM 55-1520-240-10).
j.
Shut down electrical and hydraulic power.
Disconnect the battery (Task 1-39).
k.
Open work platforms (12) as required (Task
2-2).
l.
Tie down one forward and one aft blade (14)
(Task 1-26). Disconnect pitch links from the
lower end of the affected swashplate (Task
5-97).
m.
Repeat steps 1 thru 5. If the force required
is less than 30 pounds, go to Follow-On
Maintenance. If the force is more than 30
pounds, replace the swashplate (Tasks
5-116 and 5-132 or Tasks 5-117 and 5-133).
INSPECT
FOLLOW-ON MAINTENANCE:
Connect lower drive arm to swashplate lug (Task
5-112).
Connect forward or aft pitch links at lower end, as
required (Task 5-99).
Remove blade tiedown lines (Task 1-26).
Close work platforms (Task 2-2).
END OF TASK
5-657
