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MK XXII EGPWS Installation Manual
CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 060-4314-225 REV: C
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1.5.1 MK XXII EGPWS Comp uter
The MK XXII EGPWS computer is available under P/N 965-1590-0XX with internal GPS. The MK
XXII EGPWS computer is intended for Helicopters and provides a mixture of analog and digital
interfaces. The type of supported displays is limited and includes some EFIS displays. The terrain
database included with the MK XXII EGPWS computer are North America, South America,
Europe, Eastern Europe, Africa, Asia, Pacific, South Pacific, and Middle East regions and are
comprises of terrain data (6 arc second where available), all known airports, many heliports and
man-made obstacles (North America only).
1.5.2 MK XXII EGPWS Conf iguration Module
The MK XXII EGPWS Configuration Module is available under P/N 700-1710-001 (Included in
Installation Kits, see section 1.8). The MK XXII EGPWS uses a Configuration Module installed in
the aircraft wiring to store aircraft/EGPWS interface configuration.Specifically, the module comes
prewired and replaces part of the backshell of the (P2) connector that plugs into the front of the
MK XXII computer. The Configuration Module is read by the EGPWS only during power up. The
configuration is copied into Non Volatile Memory (NVM) of the EGPWS. The Configuration
Module is programmable via an RS-232 interface with the EGPWS. The contents of the
Configuration Module can also be read back via the same RS-232 interface.
1.5.3 GPS Antenna
EGPWS installations using the internal GPS require an active GPS antenna and cabling. The
GPS antenna should meet the following qualifications:
Frequency: 1575.42 MHz
Impedance: 50 ohms
Gain: 33dB max, 26.5 dB preferred
Power: 5 VDC
Qualification: TSO C129 or C129a or C144
The following GPS antennas are found to be compatible with the EGPWS internal GPS card.
Other GPS antennas may be found compatible, contact EGPWS engineering for assistance. It is
the responsibility of the OEM or owner/operator (and ultimately the regulatory authorities) to
assess the antenna acceptance criteria relative to ARINC, MIL, or other specifications.
King KA 91 P/N 071-01545-0200 TSO-C129
King KA 92 P/N 071-01553-0200 TSO-C129
Sensor Systems P/N S67-1575-52 TSO-C129, ARINC 743A
Sensor Systems P/N S67-1575-133 TSO-C129a, ARINC 743A
1.5.4 OAT Sensor
The OAT sensor is available from Computer Instruments Corp. (CIC) P/N 05257. The EGPWS
uses a separate OAT sensor (Outside Air Temperature) to measure outside air temperature on