# SDR USAA2012042000016

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2012
- Submitted: April 20, 2012
- Operation: Air carrier
- Aircraft: [N840AW](https://openairdocs.org/aircraft/N840AW), registered now
- Make and model: Airbus A319-132
- Registry model: [Airbus A319-132](https://openairdocs.org/model/airbus-a319-132) (OpenAirDocs)
- Aircraft serial: 2690
- Aircraft time: 21,051 hours, 9,109 cycles
- System (JASC): [3452 · ATC Transponder System](https://openairdocs.org/jasc/3452)
- Part: Transponder
- Part number: 8221338020
- Part serial: 1687CH
- Condition: Inoperative
- Location: Atc
- Part time: 21,051 hours, 9,108 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2012042000016

## Discrepancy

"TCAS STBY" MESSAGE REMAINED ILLUMINATED ON UPPER ECAM MESSAGES IN FLIGHT.  REMOVED AND REPLACED NR 1 & NR 2 ATC TRANSPONDERS IAW AMM 34-52-33.  OPS CHECKED GOOD.

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