# SDR ERAA065408

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 10, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N423EH](https://openairdocs.org/aircraft/N423EH), registered now
- Make and model: Bolkms BO105S
- Aircraft serial: S543
- Engine: Allsn 250C20B
- System (JASC): [7210 · Turbine Engine Reduction Gear](https://openairdocs.org/jasc/7210)
- Part: Gear
- Condition: Spalled
- Location: Gearbox
- Part time: 6,294 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ERAA065408

## Discrepancy

ENGINE MAKING METAL.  GEARBOX PINION GEAR AND TORQUE METER GEAR TEETH SPALLING AND PITTING.

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