INSTALL PALLET THRUST IDLER BELLCRANK
If a crack in the connecting link,
bellcrank, or support is suspected
during installation, refer to TM
On helicopters without 74 , perform the following
Check nut (1) on bolt (3) to make sure it is
at about mid-position.
Insert bolt (3), with washer (2), in arm (4) of
thrust idler bellcrank (5). Install washer (6)
and nut (7) on the bolt. Do not torque the
nut at this time.
Remove two nuts (8 and 9), four washers
(10, 11, 12, and 13), and two bolts (14 and
15) from support (16).
Remove two slip fit bushings (16.1). Clean
bushings (16.1), bushing bores, and inside
diameter of bushing (16.2) with dry cleaning
solvent (E162) and clean cloths (E120).
Coat bushings (16.1) with yellow epoxy
primer (E292.1). Install bushings wet in
Temporarily remove bushing (16.3) from hole
(16.4) in support (16).
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
Ensure that all bushings are properly
installed (including orientation) in each
input and output clevis of the idler.
Ensure idler hub bearings are
serviceable and properly installed.
Ensure detent striker bolt and locknuts
Ensure proper attaching hardware
associated with all components
mounted to this idler assembly and the
idler assembly itself (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.
Position bellcrank (5) in support (16), with
arm (4) up and forward. Install bolt (14),
with washer (10), through hole (16.4) in the
support arm of support (16), into the hole with
bushing (16.1), then through the bellcrank
and the outboard end of the support. Install
washer (11) and nut (8).
Install bushing (16.3) in hole (16.4) of support
Install bolt (15), with two washers (13 and 12),
and nut (9) in the inboard lug of support (16).