TM 55-1520-240-23-9
11-6.2.1
FLIGHT CONTROL POWER-ON LOOSENESS CHECK
11-6.2.1
INITIAL SETUP
Applicable Configurations:
All
Tools:
Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692
Materials:
None
Personnel Required:
Medium Helicopter Repairer (2)
References:
Task 11-6.2
Equipment Condition:
Battery Connected (Task 1-39)
Electrical Power On
Hydraulic Power On
1.
Check dry-type control system linkage bearings
for excess looseness without removing the
component as follows;
Keep head, hands and other body
parts clear of moving flight controls.
Hydraulic forces are strong enough to
cause severe injury.
a.
Apply hydraulic boost pressure to the flight
control hydraulic system.
b.
Open all necessary covers for access to the
flight controls.
c.
Move cockpit controls as required to position
the component being inspected so it can be
moved axially between its supports.
d.
Move the component in an axial direction as
far as it will go, using strong hand pressure.
e.
Measure the axial distance between the
component and the support ear or bellcrank
lug.
NOTE
A vernier caliper or multi-leaf feeler
gage is a satisfactory tool for
measuring this distance.
f.
Move the component along its axis in the
opposite direction, use strong hand pressure.
g.
Measure the axial distance that the
component moved from its position in step e.
h.
If the component has moved in excess of
0.010 inch, perform Task 11-6.2, Check
Controls For Overall Looseness.
11-25
