# SDR 3HDR2017022000002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 2017
- Submitted: February 20, 2017
- Operation: General aviation
- Aircraft: [N227WP](https://openairdocs.org/aircraft/N227WP), registered now
- Make and model: Honda HA-420
- Registry model: [Honda HA-420](https://openairdocs.org/model/honda-ha-420) (OpenAirDocs)
- Aircraft serial: 42000029
- Aircraft time: 50 hours, 37 cycles
- System (JASC): [3445 · Air Collision Avoidance System](https://openairdocs.org/jasc/3445)
- Part: Cable
- Part number: HJ1E9143100
- Condition: Intermittent
- Location: Tcas
- Part time: 50 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/3HDR2017022000002

## Discrepancy

THE FLIGHT CREW REPORTED TCAS II INTERMITTENT FAILURES. TROUBLESHOT SYSTEM BY DOWNLOADING ASSERT LOG DATA HISTORY AND PROVIDING TO GARMIN AVIONICS TECHNICAL SERVICES FOR ANALYSIS. GARMIN DETERMINED FAULTS WERE TRIGGERED BY FAULTY LOWER ANTENNA CABLES. GAINED ACCESS AND REPLACED 4 EA. LOWER TRANSPONDER ANTENNA CABLES P/N HJ1-E9143-100-329, HJ1-E9143-100-330, HJ1-E9143-100-331 AND HJ1-E9143-100-332. FOLLOWING THE ANTENNA CABLE REPLACEMENTS A SATISFACTORY FUNCTIONAL TEST OF TCAS II SYSTEM WAS PERFORMED IN ACCORDANCE WITH HA-420 AMM TASK 34-00-02-700-806.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.