INSTALL YAW SPRING ASSEMBLY
Make sure bushings are in bellcranks
before installing bolts or component
damage will result.
Impedance bolts are installed in flight
control connections. These bolts are
self-retaining and require a special
nut and torque (Task 1-13).
Remove nut (1), two washers (2 and 3), and bolt
(4) from magnetic brake arm (5).
Position lug (6) of yaw spring assembly (7) in arm
(5) between link (8) and outboard lug (9) of arm.
Install bolt (4), two washers (3 and 2), and nut (1)
in arm (5). Do not torque nut at this time.
Remove nut (10), two washers (11 and 12), and
bolt (13) from idler bellcrank (14).
FLIGHT SAFETY PARTS
This is an installation critical flight
safety part. All aspects of its assembly
and installation must be ensured.
Ensure yaw spring assembly is
installed in the yaw axis. Incorrect
axis orientation will adversely affect
force feel damping characteristics of
the flight control system.
Ensure bearing is properly staked and
secure in the housing.
Ensure threaded end cap is secured
to the housing including installation of
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.
Position spring (7) on bellcrank (14). Install bolt
(13), two washers (12 and 11), and nut (10).
Remove tag from spring.
Torque two nuts (1 and 10) to 30 to 45
inch-pounds. Install two cotter pins (15 and 16).
Check two bolts (4 and 13). 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 6.
Perform operational check of flight controls (TM
Install closet backup panel (Task 2-2).
Install closet acoustic blanket (Task 2-108).
END OF TASK