# SDR 2017FA0000349

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 4, 2017
- Submitted: August 4, 2017
- Operation: General aviation
- Aircraft: [N202BC](https://openairdocs.org/aircraft/N202BC), registered now
- Make and model: Beech H35
- Registry model: [Beech H35](https://openairdocs.org/model/beech-h35) (OpenAirDocs)
- Aircraft serial: D5199
- Engine: Cont IO470F
- Propeller: Mcauly 2A36C23
- System (JASC): [2434 · DC Generator-Alternator](https://openairdocs.org/jasc/2434)
- Part: Alternator
- Part number: 01501237
- Part serial: A2274
- Condition: Failed
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2017FA0000349

## Discrepancy

THE ALTERNATOR WAS INSTALLED AND PRODUCED A TOTAL MECHANICAL FAILURE WITH ONLY 144.7 HOURS.  REPLACED THAT UNIT,  WHICH ALSO PRODUCED A TOTAL MECHANICAL FAILURE WITH ONLY 41.8 HOURS.  OBSERVATION SUGGESTS THAT THE ALTERNATOR CASE HARDWARE WAS NOT PROPERLY TORQUED AND/OR DID NOT USE A FORM OF LOCK FLUID.  IN EACH SCENARIO THE ACFT WAS IN NEAR IMC CONDITIONS.

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