# SDR ALGA079297

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 29, 2002
- Submitted: June 10, 2002
- Operation: Air carrier
- Aircraft: [N497AL](https://openairdocs.org/aircraft/N497AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53172
- Aircraft time: 5,732 hours
- Engine: Allsn 250C47B
- System (JASC): [7210 · Turbine Engine Reduction Gear](https://openairdocs.org/jasc/7210)
- Part: Gear
- Part number: 23071895
- Part serial: NN147467
- Condition: Spalled
- Location: Gearbox
- Part time: 486 hours
- Component: Gearbox, 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/ALGA079297

## Discrepancy

GEARBOX WAS REMOVED FOR CORRODED STUDS, DURING INSPECTION FOUND SPALLING ON PINION GEAR TEETH.

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