User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
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CAS/Part No.9005000
3 Altitude Alerter Interface
The TCAS function contains an ARINC 429 low-speed input bus that
is reserved for receiving “selected altitude” information from an
altitude control source or flight control computer. The TCAS function
uses the “selected altitude” information to ensure the weakening or
strengthening of a Resolution Advisory (RA) is consistent with the
aircrafts clearance altitude.
(c) TAWS/RWS System Interfaces
1 TAWS Display Interface
The TAWS function contains two digital 453 picture bus outputs that
transmit terrain display data to ARINC 708A compatible weather
radar displays or EFIS displays. The bus outputs can be configured
with independent range selections. The mode and range selections
are input to the system on an ARINC 429 bus.
The TAWS function also has two ARINC 429 bus outputs that
contain data for alerts and annunciation of system status.
2 ILS/MLS
The TAWS/RWS function uses Selected Runway Heading, Glide
Slope Deviation, Localizer Deviation, and ILS Select from an
Instrument Landing System (ILS) or Microwave Landing System
(MLS). TAWS/RWS can accept up to three digital ARINC 429 inputs
from an ARINC 710 ILS receiver, ARINC 727 MLS receiver, or other
non-ARINC standard interfaces.
3 Angle of Attack
On installations where T
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CAS is performing the RWS function, the
TAWS/RWS function uses the aircraft angle of attack for the
windshear computation.
TAWS/RWS can accept up to two ARINC 429 inputs from a source
such as a Digital Stall Warning Computer (DSWC) or other data
concentrator devices.
4 Decision Height
The TAWS/RWS function uses selected decision height and/or
minimum descent altitude for the generation of audio call-outs.
TAWS/RWS can accept ARINC 429 inputs or a discrete input.
5 Decision Height/Minimum Descent Altitude Switch
A flight deck switch can be used to select either decision height or
minimum descent altitude for audio call-out altitude determination.
6 Flap/Slat Settings
TAWS function uses Flap/Slat settings for TAWS alerts.
TAWS/RWS can accept ARINC 429 Flap/Slat setting inputs from a
source such as a Digital Stall Warning Computer (DSWC) or other
data concentrator devices.
Pub. No. 8600200-001, Revision 004
34-45-29
1-58
04 Nov 2014
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