TM 55-1520-240-23-9
11-189
INSTALL FIRST STAGE MIXING ASSEMBLY
(Continued)
11-189
14.1.
Check that axial play between bellcranks (7 and
2) does not exceed 0.060 inch.
14.2.
Check that axial play between bellcranks (8 and
3) does not exceed 0.060 inch.
15.
Check bellcranks (2, 3, 7, and 8). Bellcranks
shall be free to move through full range of travel.
INSTALL PITCH/THRUST AND ROLL/YAW
BELLCRANKS
Do not stand, kick, or induce lateral
loads to the thrust idler. A cracked
arm will cause in-flight failure resulting
in disconnecting the thrust cockpit
driver actuator (CCDA) and the
droop eliminator potentiometers
(Without 74 ) or thrust control position
transducer (With 74 ).
16.
Remove nut (14), two washers (15 and 16), and
bolt (17) from bellcrank (2).
17.
Position roll/yaw bellcrank (18) in bellcrank (2).
FLIGHT SAFETY PARTS
This is an installation critical flight
safety part. All aspects of its assembly
and installation must be ensured at
each joint connection and mounting to
the airframe.
Ensure that all bushings are properly
installed (including orientation) in
each input and output clevis of the
bellcrank.
Ensure bellcrank hub bearings are
serviceable and properly installed.
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
primary linkage will degrade aircraft
control. Missing components will
cause loss of control.
18.
Install bolt (17), two washers (16 and 15) and nut
(14). Do not torque nut at this time.
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