# SDR ALGA085884

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 1, 2003
- Submitted: April 7, 2003
- Operation: General aviation
- Aircraft: [N527AL](https://openairdocs.org/aircraft/N527AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53211
- Aircraft time: 5,721 hours
- Engine: Allsn 250C47B
- Engine time: 4,875 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Pinion Gear
- Part number: E6893672
- Part serial: DG13093
- Condition: Spalled
- Location: Gearbox
- Part time: 621 hours
- Component: Gearbox
- Component part number: 23063393
- Stage of operation: NR
- 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/ALGA085884

## Discrepancy

DUE TO IMPROPER MESHING OF GEARS, PINION GEAR HAD EXCESSIVE SPALLING ON GEAR TEETH. REMOVED AND REPLACED.

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