# SDR 2016FA0000226

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2016
- Submitted: May 10, 2016
- Operation: General aviation
- Aircraft: [N421ZM](https://openairdocs.org/aircraft/N421ZM), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C1058
- Engine: Cont GTSIO520*
- System (JASC): [2422 · AC Inverter](https://openairdocs.org/jasc/2422)
- Part: Alternator
- Part number: ALV9610
- Part serial: H0110195
- Condition: Failed
- Location: Rt Engine
- Part time: 96 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: H
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2016FA0000226

## Discrepancy

RIGHT ALTERNATOR FAILED.  PULLED OFF THE ALTERNATOR AND FOUND BROKEN ALTERNATOR SHAFT 1" OTBD OF DRIVE COUPLING. CAME OFF ENGINE FROM ACFT.

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