# SDR 99ZZZX2028

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N4320F](https://openairdocs.org/aircraft/N4320F), registered now
- Make and model: Piper PA-28-151
- Registry model: [Piper PA-28-151](https://openairdocs.org/model/piper-pa-28-151) (OpenAirDocs)
- Aircraft serial: 287715016
- System (JASC): [3416 · Altimeter, Barometric/Encoder](https://openairdocs.org/jasc/3416)
- Part: Transponder
- Part number: AT50A
- Condition: Malfunctioned
- Location: Cockpit
- Component: Narco
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX2028

## Discrepancy

TRANSPONDER MODE 'C' REPORTED BY ATC AS BEING INVALID 7-24-98.

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