TCAS Computer
The TCAS Computer (P/N 7517900-55020) is the central processor of the Traffic Collision Avoidance System (TCAS). It receives signals from surrounding aircraft transponders and provides Traffic Advisories (TA) and Resolution Advisories (RA) to enhance flight safety. This unit is a critical avionics component used in regional, commercial, and training aircraft to meet modern safety and regulatory requirements.
TCAS (Traffic Collision Avoidance System) independently monitors nearby transponder-equipped aircraft and predicts potential conflicts. The TCAS Computer (also called TCAS Processor/Unit) processes received data, calculates separation requirements, and generates TA/RA alerts. Outputs are sent to the Navigation Display (ND), aural warning system, and in some configurations, to autoflight/flight guidance systems.
Part Number: 7517900-55020
Name: TCAS Computer / TCAS Processor Unit
Application: Regional, training, and certain business jet platforms (compatibility depends on aircraft avionics configuration and software load).
Key Features and Benefits:
- Enhanced flight safety with timely TA/RA alerts
- Real-time processing with predictive algorithms
- Integrated cockpit compatibility with EFIS/ND and GPWS
- Built-in Test Equipment (BITE) for easier troubleshooting
- Meets ACAS/TCAS regulations
Common Failure Symptoms:
- “TCAS FAIL / TCAS STBY” messages on displays
- No traffic displayed despite active transponder traffic
- Delayed or nuisance TA/RA alerts
- Fault codes in BITE test results
- Intermittent audio warnings or communication loss with transponder
Troubleshooting Basics:
- Verify power supply and grounding
- Check transponder chain (Mode S, wiring, and antennas)
- Confirm air data inputs (altitude, speed, attitude)
- Extract BITE/fault codes to identify defective modules
- Perform ground operational tests as per AMM/TSM
(All maintenance must be performed by certified FAA/EASA approved organizations.)
Installation Notes:
- Verify P/N, software load, and service bulletin compliance
- Ensure proper mounting, cooling, and wiring in the avionics rack
- Check ARINC 429/717 data connections
- Load correct software version if required
- Perform operational and interference tests after installation
Supply Options:
- New / New Surplus with traceability
- Overhauled / Repaired / Serviceable with FAA 8130-3 or EASA Form 1
- Exchange options available
- Repair & Overhaul Services with warranty
Typical Technical Data:
- Input Voltage: 28 VDC
- Interfaces: ARINC 429/717, audio outputs, discretes
- Operating Modes: TA/RA, Standby, TA-Only
- Compatible with Mode S transponders
- Operating Temperature: -15°C to +55°C
- Standard avionics rack-mount dimensions
Documentation and Compliance:
- Supplied with EASA Form 1 / FAA 8130-3
- Must be checked against relevant ADs/SBs
- Traceability and serial number records available
Typical Applications:
- Regional jets, commuter turboprops, business jets, and advanced trainers
- Integrated with major EFIS/ND brands and TCAS control panels
Product Summary:
TCAS Computer P/N 7517900-55020
Condition: New / OHC / SV
Certification: FAA 8130-3 or EASA Form 1
Services: Repair, Overhaul, Exchange available
Packaging: Anti-static, certified for air transport
Contact for pricing and availability.
FAQs:
Is this unit compatible with my aircraft transponder?
Compatibility depends on the transponder model, wiring, and software version. Provide configuration details for confirmation.
What certification documents are included?
Each unit ships with FAA 8130-3 or EASA Form 1 release certificate and test reports.
Does it support TA-Only mode?
Yes, depending on control panel and operator approval.
What is the turnaround time for overhaul?
Turnaround varies based on findings and spares availability. Typical lead time is given after evaluation.
What should I do if a fault reappears after installation?
Record BITE codes, test results, and installation data, then contact support for troubleshooting.
