# SDR 2004F00429

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 29, 2004
- Submitted: November 30, 2004
- Operation: Air carrier
- Aircraft: [N80BS](https://openairdocs.org/aircraft/N80BS), registered now
- Make and model: Cessna 404
- Registry model: [Cessna 404](https://openairdocs.org/model/cessna-404) (OpenAirDocs)
- Aircraft serial: 4040048
- Aircraft time: 15,360 hours
- Engine: Cont GTSIO520M
- Engine time: 879 hours
- System (JASC): [2434 · DC Generator-Alternator](https://openairdocs.org/jasc/2434)
- Part: Sensor
- Part number: 99100944
- Condition: Burned Out
- Location: Alternator
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2004F00429

## Discrepancy

WHILE IN CRUISE FLIGHT, THE PILOT NOTICED SPARKS COMING FROM THE LEFT ENGINE FORWARD COWL AREA.  AS A PRECAUTION, THE ENGINE WAS SHUTDOWN AND SECURED.  THE AIRCRAFT THEN MADE AN UNEVENTFUL LANDING.  UPON INVESTIGATION, IT WAS DISCOVERED THAT THE ALTERNATOR OUT SENSOR SHORTED INTERNALLY AND HAD BURNED A HOLE THROUGH THE END OF IT'S CASE.  THE SENSOR WAS REPLACED AND AN OPS CHECK PROVED SATISFACTORY.

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