MD Helicopters 369-500, Maintenance Instructions Manual

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CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
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[ Chapter 97 TOC ]
97-00-00
Page 1
Revision 12
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
©
1999 − 2016 by MD Helicopters, Inc.
AVIONICS
DESCRIPTION AND OPERATION
1. Avionics Overview
The avionics installed in each MDHI helicopter
includes navigation and communications
equipment and an intercommunications
system (ICS).
The ICS provides an intercommunication
capability between pilot, copilot, and passen­
ger stations. The ICS has one or more control
panels which enable the crew to:
(1). Select, control and monitor voice
communications within the helicopter.
(2). Select and monitor audio signals from
communications transceivers (COMM,
NAV/COM).
(3). Select and control the communications
transceivers for voice transmission to
other aircraft or ground stations.
(4). Monitor navigation equipment (NAV,
ADF, DME, etc.).
A. ICS Systems
There are three basic ICS systems, and each is
commonly known by its control unit designa­
tion: Collins (C-6533/ARC), King (KMA 24H),
and Carter (CE 500 HT-3G).
Collins and King ICS installations and some
Carter installations have ICS control panels.
In other Carter ICS installations, intercommu­
nications functions are controlled by a single
control unit installed in the back of the
instrument panel, and COMM radio selection
is by means of a toggle switch accessible to the
pilot and copilot. (Ref. Sec. 97-02-00,
97-04-00 or 97-06-00 for additional informa­
tion).
Each ICS system has several unique installa­
tions, which are described in the optional
equipment table (CSP-HMI-2, Sec.
01-00-00).
Any ICS installation is compatible with
navigation and communications equipment
from any manufacturer.
The equipment is wired to the ICS control
panels thru TB100 (TBM300 in helicopters
with the generic wiring harness).
B. Pilot and Copilot Stations
The pilot is able to communicate over the
interphone and transmit over the COMM
radios by means of a RADIO-ICS switch
located on his cyclic stick, and a headset-mi­
crophone assembly which plugs into a jack
located on the forward side of the canted
bulkhead. The copilot has the same capability
in some ICS installations.
C. Copilot and Passenger Stations
The copilot and passengers are able to
communicate over the interphone by means of
individual headset-microphone assemblies
which require headset adaptors to interface
with the ICS; the headsets plug into the
adaptors, and the adaptors in turn plug into
jacks located on the forward and aft sides of
the canted bulkhead.
Each adaptor has a RADIO/ICS switch for
keying the mike.
In some ICS installations, the copilot may use
the RADIO/ICS switch on his adaptor to key
the COMM transmitters as well.