TM 55-1520-240-23-9
11-259
INSTALL PYLON RIGHT LOWER BELLCRANK STA 534
11-259
INITIAL SETUP
Applicable Configurations:
All
Tools:
Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692
Torque Wrench, 5 to 50 Inch-Pounds
Torque Wrench, 30 to 150 Inch-Pounds
Dial Indicating Scale, 0 to 10 Pounds
Materials:
None
Parts:
Cotter Pins
Personnel Required:
Medium Helicopter Repairer
Inspector
References:
TM 55-1520-240-23P
Task 11-33
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 orientation of the
bellcrank at installation.
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.
Bellcrank must be positioned as
indicated by arrows on bellcrank;
otherwise, serious damage to
components can occur.
NOTE
All bolts installed in flight control
system are self-retaining (impedance)
bolts. During installation of flight
controls, make sure all bolts used are
self-retaining bolts.
11-992
