MD Helicopters 369-500, Maintenance Instructions Manual

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CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
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95-10-30
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Revision 7
The information disclosed herein is proprietary to MD Helicopters, Inc.
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
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1999 − 2016 by MD Helicopters, Inc.
INSTANTANEOUS VERTICAL SPEED INDICATORS
INITIAL INSTALLATION
1. Instantaneous Vertical Speed Indicators
Initial Installation
Procedures in this section may be performed at
operator's discretion and provide complete
instructions for all initial installations of the
instantaneous vertical speed indicators (IVSI)
except for the 369D294508-709.
A. Preparation for Installation
(1). Identify all components, including
attaching hardware and 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 BATT-OFF-EXT switch is
OFF.
B. Helicopter Equipment Removal
(1). (Slim-Line instrument panels and L/H
command T-Panels) Remove instru­
ment panel hood and left and right
instrument panel fairings.
(2). R/H command T-Panels:
Remove instrument panel hood.
(3). Slim-Line instrument panels and L/H
command T-Panels:
Remove blank panel from space where
IVSI is to be installed (Ref. Figure 201
or Figure 202).
C. Instrument Panel Modification (Slim − Line
Instrument Panels)
If IVSI UI7130 is to be installed (Ref.
Figure 201 for locater), it is necessary to
modify the cutout in the instrument panel to
allow clearance for the instrument knob. Using
a half round file, notch the lower left screw
hole.
D. Instrument Panel Modification (L/H
Command T − Panels)
If IVSI UI7130 is to be installed (Ref.
Figure 202 for locater), modify the instrument
panel as follows, to allow clearance for the
instrument knob.
(1). Remove lower left nutplate from
instrument panel by drilling out two
rivets. Discard nutplate.
(2). Using nutplate screw hole as a pilot
hole for hole saw, drill hole out to 1 inch
(2.54 cm). Then notch cutout as shown,
using flat file.
E. Instrument Panel Modification (IVSI
SLZ9066, R/H Command T − Panels)
If IVSI SLZ9066 is to be installed, it is
necessary to cut a hole in some instrument
panels. Drill fastener holes using No. 25 drill
bit. Notch lower left hole to allow clearance for
the instrument knob, using Letter R drill bit
followed by flat file.
F. Instrument Panel Modification (IVSI
UI7130 or AC − 30 − V − 10, R/H Command
T − Panels)
IVSI UI7130 or AC-30-V-10 may be installed
in an instrument panel which has been
modified for IVSI SLZ9066. The existing lower
left hole must be notched, using a half round
file, to allow clearance for the instrument
knob. If the instrument panel has not been
previously modified, perform the above
procedures (Ref. Instrument Panel Modifica­
tion for IVSI SLZ9066) prior to notching.
G. IVSI Installation (369H90044 − BSC,
Slim − Line Instrument Panels)
(1). (Primary location only) If -31 clamp
and -21 bracket will be installed,
perform the following steps:
(a). Drill clamp for nutplates, using 13/64
drill followed by 3/32 inch (2.38 mm)
drill for rivet holes. Rivet nutplates
to clamp.
(b). Drill bracket.