# SDR 95ZZZX4398

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 2, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N7436C](https://openairdocs.org/aircraft/N7436C), registered now
- Make and model: Piper PA-23-250
- Registry model: [Piper PA-23-250](https://openairdocs.org/model/piper-pa-23-250) (OpenAirDocs)
- Aircraft serial: 277754017
- System (JASC): [2410 · Alternator-Generator Drive](https://openairdocs.org/jasc/2410)
- Part: Drive Pulley
- Part number: PU672A
- Condition: Failed
- Location: Alternator
- Component: Prestolite, ALU8421
- Stage of operation: IN
- Nature of condition: H
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX4398

## Discrepancy

DURING RUN-UP, LEFT ALTERNATOR FAILED AND COULD NOT BE RESET. INSPECTION REVEALED THE DRIVE PULLEY HOUSING HAD SHEARED.  SUSPECTED CAUSE IS MATERIAL FAILURE OF THE METAL ITSELF.  SUBMITTER RECOMMENDS THAT OTHER OPERATORS INSPECT THE DRIVE PULLEYS OF SIMILAR ALTERNATORS.  PART HAS BEEN RETAINED FOR INSPECTION.

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