User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Figure 1-4: Basic TCAS Installation
(2) TAWS Functional Description
The T
3
CAS TAWS function provides guidance to prevent Controlled Flight Into
Terrain (CFIT). This is accomplished by using vertical speed, ground speed,
track angle, flight path angle, latitude, longitude, flap status, steep approach
status, static air temperature, roll angle, pressure altitude and radio altitude
inputs along with a built-in database for determination of alerts and display of
terrain information.
The following advanced functional capabilities are featured in the T
3
CAS TAWS
function.
(a) Collision Prediction and Alerting (CPA) Mode
This mode provides medium-term (caution) and short-term (warning)
alerts when the predicted flight path will bring the aircraft dangerously
close to nearby terrain (and when enabled, Obstacles). When operative,
CPA conditionally replaces RTCA DO-161A reactive Mode 2 since it
offers superior safety margins for CFIT prevention due to its predictive
capabilities.
1-32
04 Nov 2014
34-45-29
Pub. No. 8600200-001, Revision 004
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