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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
Page 1-2
006-10536-0010 Rev. 10 Oct/2005
Some part numbers may not be currently available. Consult the current
Honeywell catalog or contact a Honeywell representative for equipment
availability. The KRA 405B System also may consist of previously TSO
certified components from the following list. However the use of any
configurations other than the preferred configuration will result in
reduced functionality of the system.
Upon use of the above antennas or any other configurations, the STC
certification will be the sole responsibility of the customer and/or the
installing agent. Please contact a field representative for additional
information.
1.1 DESCRIPTION OF EQUIPMENT
The KRA 405B Radar Altimeter System provides the pilot with dependable,
accurate AGL (altitude above ground level) information during the approach
phase of a flight. The system has the capability of alerting the pilot
when a predetermined altitude (decision height) is reached. The system
also provides altitude information to the flight control system during the
approach.
The KRA 405B Radar Altimeter (P/N 066-01153-0202), in addition to
providing an ARINC 552A output for Auxiliary Out 2, has the ability to
take a DH input from an EFIS or KNI 415/416 and generate an audio signal
(refer to section 1.3. C. KRA 405B RECEIVER/TRANSMITTER for tone generator
circuit specifications).
The KRA 405B Radar Altimeter (P/N 066-01153-2001/-4001) provides enhanced
accuracy (± 2 feet) below 100 feet using the digital 429 Buss labels 164
and 165.
Both KRA 405B versions P/N 066-01153-0101 and P/N 066-01153-0202 with
software 01/04, 02/04 or higher will not report negative values of
altitude on the ARINC 429 digital bus unless expressly configured to do
so. This feature is required for installations with Honeywell EFIS 40/
50. One of these two unit versions (-0101 or -0202) must be used when
interfacing the digital output of the KRA 405B to equipment which expect
non-negative values.
The KRA 405B determines the altitude above ground level (AGL) by
transmitting a signal to the ground then processing the reflected signal.
The altimeter outputs the altitude information as analog voltages and in
ARINC 429 digital format.
MODEL KA 54
DESCRIPTION RETROFIT ANTENNA