Integrated communication and surveillance system

Advanced traffic management in one integrated system

The T3CAS® is an integrated communication and surveillance system that combines multiple, proven products into a single small, lightweight system. The ultra-flexible T3CAS is a single LRU that can host any combination of these functions:

  • Traffic Alert and Collision Avoidance System (TCAS)
  • Terrain Awareness Warning System (TAWS)
  • Mode S Transponder with ADS-B In/Out Capability
  • ADS-B In applications

T3CAS builds on proven ACSS TCAS II products that provide situational awareness and collision avoidance protection to more than 15,000 aircraft worldwide.

Terrain Awareness Warning Systems

This Class A TAWS system is a safety enhancer, appropriate for any air transport, regional, business or military aircraft that provides pilots and crews with the appropriate amount of time needed to clear terrain with a greater margin to maneuver and avoid a Controlled Flight Into Terrain (CFIT) incident. The Terrain Advisory Line is a patented feature that indicates an impending alert, should the aircraft continue on its flight path.

Mode S Transponders

Mode S transponders are certified to DO-260B standards, and meet the ADS-B Out mandates for impending airspace initiatives, including the Federal Aviation Administration’s (FAA) NextGen and Europe’s SESAR. DO-260B enables transmission of ADS-B information about an aircraft’s position, speed and intent. Mode S transponders incorporate FAA-specified diversity, allowing simultaneous operation with both top and bottom transponder antennas, optimizing signal strength and reducing multi-path interference.


T3CAS can host ADS-B In applications designed to increase safety, efficiency and throughput for flight operators. ADS-B In applications, known as Airborne Traffic Situation Awareness (ATSAW), provide improved safety and operational efficiency for operators in all phases of flight, including flight-level change performance in non-radar coverage areas such as oceanic airspace, and Visual Separation Approach.

Dimensions 7.6 in. (h) x 4.9 in. (w) x 15.8 in. (l) 7.6 in. (h) x 7.5 in. (w) x 15.3 in. (l)
Weight 16.5 lb. (7.5 kg) 17.6 lb. (8.0 kg)
Cooling Internal Fan Requires forced air cooling per ARINC 600
Electrical 115 VAC and 28 VDC/Power Consumption 100 watts nominal
Performance Sea level to 55,000 feet/-55 70° C/ADS-B Receiver Availability > 95%
Data Data Loading UDP Protocol based Ethernet connection compliant with ARINC 615A
Antenna TCAS Directional Antenna P/N 7514081
Certifications TSO Transponder (C112d), Windshear (C117a), TCAS with Hybrid Surveillance (C119c), TAWS (C151c), ADS-B & TIS-B (C166b), Environmental DO-160E, Software DO-178B Level B, ADS-B Operation DO-260B 1090 MOPS for extended range

Product Support

Repair and Overhaul Administration:
Phone: +1 (623) 445-7030
Fax: +1 (623) 445-7002

Product Support/Customer Service:
Phone: +1 (623) 445-7070
Fax: +1 (623) 445-7001

AOG Services:
Regional, Business Jet & Military
Administered by logistics partner AVGroup
Provides exchange and rental services of ACSS LRUs to existing ACSS customers.
Phone: +1 (866) AOG-TCAS or (866) 264 8227 US callers
Phone: +1 (678) 597-2792 International callers
Fax: +1 (770) 457-8563


ACSS is a joint venture company of L3 & Thales. ACSS is responsible for the design, manufacture, and support of all our products, and handles sales to our regional airline, business aviation, general aviation and military customers, as well as all aircraft operating in the former Soviet Union. Thales Avionics is the exclusive sales and support agent of ACSS products to Commercial Air Transport customers operating Airbus and Boeing aircraft. For more information on Thales Avionics, please visit

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