User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
the potential threat of aircraft collision with terrain. When operative, CPA replaces RTCA DO-
161A reactive Mode 2 since it offers superior safety margins for controlled flight into terrain (CFIT)
prevention due to its predictive capabilities.
T
3
CAS TAWS meets the requirements of TSO-C151 Class A, refer to Table 1-2
The obstacle awareness function provides additional CPA for man-made obstacles.
The Eleview function provides additional terrain display enhanced situational awareness
independent of aircraft altitude. Eleview is displayed to the flight crew by a pair of three digital
MSL elevations. These numbers represent the MSL terrain elevation in hundreds of feet (e.g.,
250 is 25,000 feet). The top number represents the MSL altitude of the highest display terrain and
the bottom number represents the MSL altitude of the lowest displayed terrain. When above the
highest terrain elevation by a user defined altitude, the Eleview function will show three shades of
green to represent terrain. On supporting displays, water can be depicted in cyan.
The T
3
CAS Mode S Data Link Transponder function supplies surveillance functions to both
ground-based and airborne interrogators and communication functions to onboard systems. The
transponder contains data link functions that allow it to function as part of the Aeronautical
Telecommunications Network (ATN). The data link functions allow communication with a
Communication Management Unit (CMU) through a Mode S Airborne Data Link Processor
(ADLP). The transponder also contains Mode S Specific functions, which are dedicated links
directly to onboard systems. The transponder can be upgraded to supply an internal ADLP
function. The T
3
CAS Transponder conforms to the ARINC 718A Mode S Transponder
Characteristic for function. The T
3
CAS Transponder is fully compliant with the Mode S
Elementary and Enhanced Surveillance (ELS/EHS) selective interrogation requirements. The
transponder reports ELS Flight Identification as well as Aircraft Intent (BDS 4,0 - Selected
Altitude), Track and Turn Report (BDS 5,0 - Roll Angle, True Track Angle, Groundspeed, Track
Angle Rate, and True Airspeed), and Speed and Heading Report (BDS 6,0 – Magnetic Heading,
Indicated Airspeed, Mach Number, Baro Altitude Rate, and Inertial Vertical Velocity).
The T
3
CAS transponder provides ADS-B, either per DO-260A or DO-260B based on T
3
CAS part
number, refer to Table 1-2. This is a function for airborne and surface aircraft which transmit
horizontal and vertical position and velocity as well as other pertinent information. This ADS- B
functionality will support improved used of airspace, improved surface surveillance, and
enhanced safety.
2. System Components
The tables that follow within this section provide information regarding the components within the
system as well as related configuration information as categorized by the table caption.
Table 1-1: System Components
Component
ACSS Part No.
T3CAS Computer Unit, refer to Table 1-2 for unit
configurations.
9005000-XXYYY (Note 1)
Directional Antenna (See Table 1-7 for configuration
descriptions)
7514081-VAR or 7514060-VAR
1-2
04 Nov 2014
34-45-29
Pub. No. 8600200-001, Revision 004
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