# SDR 2007FA0000085

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2007
- Submitted: January 17, 2007
- Operation: General aviation
- Aircraft: [N321AK](https://openairdocs.org/aircraft/N321AK), registered now
- Make and model: Piper PA-34-220T
- Registry model: [Piper PA-34-220T](https://openairdocs.org/model/piper-pa-34-220t) (OpenAirDocs)
- Aircraft serial: 3447021
- Aircraft time: 4,479 hours
- Engine: Cont TSIO360KB
- Engine time: 4,479 hours
- Propeller: Mcauly 3AF32C509
- System (JASC): [2434 · DC Generator-Alternator](https://openairdocs.org/jasc/2434)
- Part: Coupling
- Part number: 635796
- Condition: Failed
- Location: Alternator
- Part time: 4,479 hours
- Component: Alternator, Cont
- Component part number: 653344
- Stage of operation: CR
- How discovered: O
- Nature of condition: H, G
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2007FA0000085

## Discrepancy

ALTERNATOR DRIVE COUPLING FAILED ON LT AND RT ALTERNATOR, IN IMC SIMULTANEOUSLY. COUPLING FAILURE RESULTED IN TOTAL ELECTRICAL FAILURE, RT ENGINE.

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