TM 55-1520-240-23-9
11-122
INSTALL YAW VISCOUS DAMPER
(Continued)
11-122
Bushing must be link before installing
bolt; otherwise, damage to component
will result.
NOTE
Impedance bolts are installed in flight
control connections. These bolts are
self-retaining and require a special
nut and torque (Task 1-13).
7.
Position damper (5) on pallet (9), arm (1)
outboard and aft. Install two bolts (10) and
washers (11) in damper.
7.1.
Torque bolts (10) to 23 inch-pounds.
8.
Remove nut (12), two washers (13 and 14) and
bolt (15) from link (16).
9.
Position arm (1) in link (16). Install bolt (15), two
washers (14 and 13), and nut (12) in link and
arm. Bolthead must be outboard.
10.
Torque nut (12) to 15 to 25 inch-pounds. Install
cotter pin (17).
11.
Check bolt (15). Bolt shall not rotate with torque
less than 10 inch-pounds. There shall be no
axial looseness. If bolt rotates or is loose, and
washer under nut and repeat step 10.
INSPECT
FOLLOW-ON MAINTENANCE:
Perform yaw control operational check (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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