TM 55-1520-240-23-9
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INSTALL PITCH OR ROLL SPRING ASSEMBLIES
(Continued)
11-147
FLIGHT SAFETY PARTS
This is an installation critical flight
safety part. All aspects of its assembly
and installation must be ensured.
Ensure roll spring is installed in the
roll axis. Incorrect axis orientation will
adversely affect flight controls force
feel characteristics.
Ensure bearing is properly staked and
secure in the housing.
Ensure threaded end cap is secured
to the housing including installation of
lockwire.
Ensure proper attaching hardware
(impedance type bolt, nut, and
washers) is installed including
verification of bolt head orientation,
torque, and installation of cotter pins.
Loose attachments within flight control
secondary linkage will degrade
aircraft control. Missing components
may cause loss of control.
4.
Position spring (7) on bellcrank (12). Install bolt
(11), two washers (10 and 9), nut (8). Remove
tag from spring.
5.
Torque two nuts (1 and 8) to 30 to 45
inch-pounds. Install two cotter pins (13 and 14).
6.
Check two bolts (4 and 11). Bolts shall not rotate
with torque less than 10 inch-pounds. There
shall be no axial looseness. If bolts rotate or are
loose, add washer under nut and repeat step 5.
INSPECT
FOLLOW-ON MAINTENANCE:
Perform operational check of flight controls (TM
55-1520-240-T).
Install closet backup panel (Task 2-2).
Install closet acoustic blanket (Task 2-108).
END OF TASK
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