# SDR 20000804SH022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 18, 2000
- Submitted: August 4, 2000
- Operation: General aviation
- Aircraft: [N477AL](https://openairdocs.org/aircraft/N477AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53203
- Engine: Allsn 250C47B
- System (JASC): [7210 · Turbine Engine Reduction Gear](https://openairdocs.org/jasc/7210)
- Part: Pinion Gear
- Part number: 6893672
- Part serial: NN76900
- Condition: Galled
- Location: Gearbox
- Part time: 1,985 hours
- Component: Gearbox, CAG47276
- Component part number: 23063393
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20000804SH022

## Discrepancy

PINION GEAR HAS EXCESSIVE GALLING ON GEAR TEETH, POSSIBLY DUE TO EXCESSIVE TORQUE ON ENGINE, GEAR CANNOT SUSTAIN LOAD.  (X)

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