Eagle ICA-D212-725, Instructions Manual

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ICA-D212-725 (63)
Page 121 of 144
CHAPTER 63 – MAIN ROTOR DRIVE SYSTEM (63-00-00)

COPYRIGHT

2007 BY DART AEROSPACE LTD.

THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
6
Date: 13.08.26
mount with press ram so as to deflect mount in a
vertical plane, not to exceed 0.25 inch (6.35 mm)
deflection. Cycle mount five or six times.
63.9.2.2.5.6
Mount a dial indicator to arbor
press with finger of indicator touching pressing
button.
63.9.2.2.5.7
Apply slight pressure to button
with ram to ensure it is seated.
63.9.2.2.5.8
On 204-031-927-007 pylon mount,
apply enough pressure to pressing button to
deflect mount 0.10 inch (2.54 mm). If pressure
required to deflect mount 0.10 inch (2.54 mm) is
405 to 495 lbs. (1801 to 2201 N), mount is
serviceable.
63.9.2.2.5.9
On 204-031-927-005 pylon mount,
apply enough pressure to pressing button to
deflect mount 0.10 inch (2.54 mm). If pressure
required to deflect mount 0.10 inch (2.54 mm) is
900 to 1100 lbs. (4003 to 4893 N), mount is
serviceable.
63.9.2.3 Installation
MATERIALS REQUIRED
Refer to BHT-ALL-SPM for specification and
source.
NUMBER NOMENCLATURE
C-313 Adhesive
C-405 Lockwire
CAUTION
ISOLATION MOUNT INSTALLATION BOLTS (22
AND 23 FIGURE 63-53) ARE DIFFERENT
LENGTHS. REFER TO VIEW A, FIGURE 63-53
FOR PROPER INSTALLATION.
63.9.2.3.1
Install each of four main mounts
as follows:
63.9.2.3.1.1 Assemble
steel bushing (17,
Figure 63-53) on bolt (15). Insert bolt (15) through
mount (18) from longer end of mount. Ensure
bushing is properly seated on bolt and mount.
Position bushing (20) on bolt and mount. Install
boots (19) on each end of mount.
63.9.2.3.1.2
On rear mounts, if dampers were
removed with mounts: Attach friction damper (11)
upper fitting to clevis on lower end of mount bolt
(15) with a bolt, nut, and washer.
63.9.2.3.1.3
Place filler plate (10 or 16) on
mount below flange. Position assembly in opening
on pylon support. Attach mount flange and filler
plate to support with two bolts (22), two bolts (23),
and thin steel washers (21). Torque bolts 100 to
140 inch-lbs. (11.30 to 15.82 Nm).
63.9.2.3.1.4 Align
rear mount damper (11)
lower end fork on fitting (14). Secure with bolt,
washer, and nut.
63.9.2.3.2
Install fifth mount as follows:
63.9.2.3.2.1
Assemble boot (4) and washer (3)
on shortest end of mount. Insert eyebolt (2)
through washer and mount. Install washer and nut
on lower end of bolt, torque 480 to 600 inch-lbs.
(54.23 to 67.79 Nm) and secure with cotter pin.
63.9.2.3.2.2
Position mount assembly in fifth
mount support (1), with two laminated filler plates
(6) under mount flange. Attach with four bolts (25)
and washers (24). Secure boltheads in pairs with
Iockwire (C-405).
NOTE
When transmission is installed, it may be
necessary to peel filler plates for alignment. Add
one washer per bolt for every 0.06 inch (1.52 mm)
lamination removed. Check bolt for correct
amount of thread engagement before installing.
63.9.2.3.2.3
If support fitting was removed,
check mounting points on rear of pylon support for
fillers bonded to structure to provide clearance for
fitting over rivet heads. (Not more than two fillers
at each side, bonded at 65 to 85°F (18 to 29°C)
with adhesive (C-313)). Position fitting on pylon
support, and attach each end with four bolts and
washers.