# SDR 702DK

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 13, 2007
- Submitted: December 7, 2007
- Operation: Air carrier
- Aircraft: N702DK
- Make and model: Beech C90A
- Registry model: [Beech C90A](https://openairdocs.org/model/beech-c90a) (OpenAirDocs)
- Aircraft serial: LJ1259
- Aircraft time: 4,116 hours, 4,022 cycles
- Engine: Pwa PT6A60A
- System (JASC): [3452 · ATC Transponder System](https://openairdocs.org/jasc/3452)
- Part: Control Head
- Part number: 6226523008
- Part serial: 8305
- Condition: Faulty
- Location: Transponder
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/702DK

## Discrepancy

BOTH NR 1 AND NR 2 TRANSPONDER DISPLAYS WENT OUT DURING FLIGHT ATC REPORTED TRANSPONDER FAULTS. AIRCRAFT RETURNED TO POINT OF DEPARTURE WITHOUT INCIDENT.  FAILURES TROUBLESHOT TO FAULTY TRANSPONDER CONTROL HEAD.

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