# SDR 2008FA0000858

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 18, 2008
- Submitted: December 1, 2008
- Operation: General aviation
- Aircraft: N739NM
- Make and model: Bell 206L-3
- Registry model: [Bell 206L-3](https://openairdocs.org/model/bell-206l-3) (OpenAirDocs)
- Aircraft serial: 51124
- Engine: Allsn 250C30P
- System (JASC): [7412 · Exciter](https://openairdocs.org/jasc/7412)
- Part: Exciter
- Part number: 106149504
- Part serial: 475043
- Condition: Intermittent
- Location: Powerplant
- Stage of operation: TX
- 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/2008FA0000858

## Discrepancy

ENGINE HAD AN INTERMITTENT DELAYED LIGHTOFF CAUSING HOT STARTS.  REPLACING THE IGNITION EXCITER CORRECTED THE PROBLEM. THE DEFECTIVE EXCITER WAS FOUND TO HAVE A LOOSE STUD WHERE THE INPUT VOLTAGE IS APPLIED.  SUSPECT THIS WAS CAUSING A LOW OUTPUT VOLTAGE.  IT APPEARS THE NUT ON THE STUD WAS OVERTORQUED DURING INSTALLATION, CAUSING THE STUD TO LOOSEN.  (K)

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