Eagle ICA-D212-725, Инструкция по эксплуатации

Страница: 420 / 729

ICA-D212-725 (63)
Page 93 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
63.6.2 Oil Cooler Blower
Oil cooler blower is located in the aft fuselage,
below the engine tailpipe. Cooling air flow is
provided by a turbo blower that is bleed air driven.
63.6.2.1 Removal – Oil Cooler Blower
63.6.2.1.1
Open access door at right side of
fuselage below engine tailpipe.
63.6.2.1.2
Remove blower screen.
63.6.2.1.3
Disconnect air hose from blower
inlet fittings.
63.6.2.1.4
Remove three bolts, with nuts and
washers, to detach blower from support bracket on
fuselage bulkhead.
63.6.2.1.5
Remove eight bolts and washers
to detach blower from duct. Remove blower
assembly.
63.6.2.1.6
Remove eight bolts and washers
which secure upper flanges of cooler and mount to
sides of duct. Remove duct.
63.6.2.2 Installation – Oil Cooler Blower
63.6.2.2.1 Install
reducer orifice, with packing
in blower inlet.
CAUTION
MAKE SURE REDUCER ORIFICE IS INSTALLED
IN BLOWER INLET TO PREVENT BLOWER
OVERSPEED.
63.6.2.2.2
Check that support bracket is
secured with three screws and washers on
fuselage bulkhead above oil cooler location.
63.6.2.2.3
Position blower assembly, with
inlet pointing forward at left side, to align mounting
holes with duct flange and support bracket.
63.6.2.2.4
Attach blower to duct with eight
bolts and thin aluminum alloy washers under each
bolt head and nut.
63.6.2.2.5
Attach blower to support bracket
with three bolts, using thin alloy washers under
each bolt head and nuts.
63.6.2.2.6
Connect hose from bleed air valve
line to blower inlet.
63.6.2.2.7
Install screen on blower flange
with bolts, washers, grommets, and nuts.
63.6.3 Quick Threading Couplings
This type coupling is readily connected by twisting
the socket in a clockwise direction onto the
threaded nipple portion. The three equally spaced
indicating pins on the socket half will assume an
extended position when these coupling halves are
properly connected and will assume a retracted
position when coupling halves are separated.
Their only function is to provide a see or feel
means of determining whether or not the coupling
is fully connected.
Disconnecting is accomplished by pulling back the
knurled socket outer shell and turning
counterclockwise. This type coupling employs
spring loaded valves which open each other when
coupling is connected, and immediately return to
the closed position when disconnected. Do not
employ gripping tools to connect or disconnect
these types of couplings as these actions can be
readily accomplished by hand.
63.6.3.1 Troubleshooting Quick Threading
Couplings
NOTE
The following is to assist in determining cause of
coupling leakage and to spot signs of impending
failure.
63.6.3.1.1
If leakage occurs between the
connected halves, the most probable cause is
wear or damage to the seal that encircles the
nipple and/or damage to the sealing portion of the
nipple.
63.6.3.1.2
Leakage at the point where the