Eagle ICA-D212-725, Инструкция по эксплуатации

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ICA-D212-725 (63)
Page 18 of 144
CHAPTER 63 – MAIN ROTOR DRIVE SYSTEM (63-00-00)
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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
nicks, scratches, and corrosion may be polished
out, provided cleanup does not exceed 0.005 inch
(0.127 mm) depth and is blended into surrounding
surface. Protect repaired area with inhibitor (C-
417) (BHT-ALL-SPM).
63.3.2.2.3 Replace
mast assembly if surface
damage exceeds limits (BHT-212-CR&O) or if
there are indications of unserviceable bearing
condition due to corrosion, unusual wear, or
bearing failure.
63.3.2.2.4
Seepage of oil through drain hole
of upper bearing assembly (3, Figure 63-7) may
be due to an unserviceable mast bearing oil seal.
63.3.2.3 Installation
MATERIALS REQUIRED
Refer to BHT-ALL-SPM for specification and
source.
NUMBER NOMENCLATURE
C-308 Adhesive
SPECIAL TOOLS REQUIRED
NUMBER NOMENCLATURE
T101581 Maintenance hoist or equivalent
204-011-178-001 Clevis
CAUTION
BEFORE INSTALLING MAST, PERFORM
DIMENSIONAL CHECK OF TRANSMISSION TO
PRECLUDE POSSIBILITY OF DAMAGE TO
PLANETARY ASSEMBLIES DURING MAST
INSTALLATION.
63.3.2.3.1
If installed, remove cover plate
from transmission.
63.3.2.3.2 Perform
dimensional check of
transmission as follows:
63.3.2.3.2.1
Place a straight edge on top case
of transmission. Measure from top surface of
mast adapter in transmission to straight edge and
record dimension (Figure 63-8).
63.3.2.3.2.2 If dimension is less than 2.570
inches (65.278 mm), examine upper and lower
planetary support liners to determine if tangs of
upper liner are disengaged from mating slots in
lower liner.
WARNING
USE CARE IN HANDLING PARTS TO AVOID
POSSIBLE INJURY TO FINGERS.
63.3.2.3.2.3 If tangs are disengaged, gap
between the two liners would be approximately
0.25 inch (6.35 mm). If gap is this large, re-index
these two liners by inserting hands, backs
together, through mast driving adapter.
63.3.2.3.2.4 Lift adapter slightly and rotate
upper liner until tangs are correctly engaged in
slots.
63.3.2.3.2.5
Recheck dimensions from top of
adapter to straight edge placed across top case
opening.
63.3.2.3.2.6 Ensure
mast assembly is clean
and bearings are serviceable and properly
secured.
63.3.2.3.2.7 Verify
cotter pins do not interfere
with rear lower aluminum guide race, and nut (1,
Figure 63-7) is installed on top of mast.
63.3.2.3.3 Attach T101581 hoist, or
equivalent to mast nut using clevis, 204-011-178-
001. Lift mast to position over transmission (5).
NOTE
Heating top case of transmission with a heat lamp
will aid in installation
63.3.2.3.4
Apply a thin coating of adhesive
(C-308) to lower mating surface of retainer plate
and transmission top case.
63.3.2.3.5 Lower mast carefully into
transmission, guiding lower end into bearing
retainer plate to position indicated by FWD arrow
marking before plate engages on mounting studs