TM 55-1520-240-23-9
11-88
INSTALL COCKPIT CONTROL TRANSFER BELLCRANKS
(Continued)
11-88
INSTALL YAW TRANSFER BELLCRANK
13.
Install spacer (4) on support (5), with marks
aligned.
14.
Align mark on end (2) of shaft (3) with hole (18)
in support (5).
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 proper orientation of bellcrank.
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.
15.
Position yaw transfer bellcrank (19) between
bellcrank (15) and support (5), long arm (20) aft
and arm (21) up.
FLIGHT SAFETY PARTS
This is an installation critical flight
safety part. All aspects of its assembly
and installation must be ensured.
Ensure that all associated spacers,
washers, and bushings are installed.
Ensure MS17826-4 nut is tightened
using proper installation procedure to
prevent excess torque application to
the associated bellcrank hub bearings
thereby restricting free rotation of the
components.
At installation of this component,
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.
16.
Slide shaft (3) through bellcrank (19) and into
spacer (4). Align holes of spacer (4), shaft (3),
and support (5). Move bellcranks and tap end of
shaft to assist sliding of shaft. Use soft-faced
hammer.
11-471
