MD Helicopters 369-500, Инструкция по техническому обслуживанию

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CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
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95-20-10
Page 901
Revision 7
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Neither this document nor any part hereof may be reproduced or transferred to
other documents or used or disclosed to others for manufacturing or any other
purpose except as specifically authorized in writing by MD Helicopters, Inc.
Copyright
©
1999 − 2016 by MD Helicopters, Inc.
DIRECTIONAL GYRO INDICATORS
INITIAL INSTALLATION
1. Directional Gyro Indicator Initial
Installation
Procedures in this section may be performed at
operator's discretion and provide completed
instructions for initial installation of the
directional gyro indicators.
A. Directional Gyro Indicator Operating,
Handling and Shipping Guidelines
Before involvement with a di­
rectional gyro indicator, wheth­
er loose, installed in the helicopter, or even
sealed in its shipping container, become fa­
miliar with gyro cautions (Ref. Attitude
Gyro Indicator Operating, Handling and
Shipping Guidelines, Sec. 95-10-20).
B. Preparation for Installation
(1). Identify all components, including
attaching hardware, or components
removed for access to work areas.
Protect components from damage and
foreign matter until installed.
(2). Check all cockpit electrical switches for
OFF condition.
NOTE:
Make sure that BATT-OFF-EXT
switch is OFF.
C. Helicopter Equipment Removal
(Ref. Figure 201) Prior to installation of the
directional gyro indicator, the following items
must be removed.
(1). Remove instrument panel hood and left
and right instrument panel side
fairings.
(2). Remove blank panel located where
directional gyro indicator is to be
installed on instrument panel. Retain
washers for reuse if indicator is to be
installed in a Slim-Line panel.
D. Instrument Panel Support Structure
Modification (Slim − Line Instrument
Panel)
E. Angles Modification
(Ref. Figure 201) Prior to installation of the
directional gyro indicator, it is necessary to
modify angles in the instrument panel
structure.
F. T − brackets and Support Assembly
Installation
(Ref. Figure 201) The directional gyro indicator
is supported in the rear by a clamp fastened to
a horizontal support assembly. The support
assembly is mounted on two T-brackets
riveted to the instrument panel support
structure. Some helicopters already have both
the T-brackets and the support assembly
installed (-501 installation and ships with
attitude gyro indicator installed). Other
helicopters have only the T-brackets (-505
installation). Some helicopters require rework
of the instrument panel in order to add both
the T-brackets and the support assembly
(-503 and -507 installations). Perform only
the appropriate steps for your helicopter.
NOTE:
Removing one or both center wind­
shield panels will simplify this rework.
(1). Locate existing stiffener and drill out
attaching rivets as required to accom­
modate installation of T-brackets.
(2). Position T-brackets and support
assembly in place (support with clamps)
and drill brackets for new rivets (pick
up existing rivet holes drilled out in
previous step).
(3). Rivet T-brackets to instrument panel
support structure.
(4). With support assembly clamped to
T-brackets, drill support assembly for
fasteners (pick up existing holes in
T-brackets).
(5). Install support assembly to T-brackets,
using screws, nuts and washers.
CAUTION