# SDR ALGA096951

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 26, 2004
- Submitted: August 23, 2004
- Operation: Air carrier
- Aircraft: N617AL
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53265
- Aircraft time: 5,295 hours
- Engine: Allsn 250C47B
- Engine time: 1,895 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Pinion Gear
- Part number: 6893672
- Part serial: UG12599
- Condition: Spalled
- Location: Gearbox
- Part time: 765 hours
- 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/ALGA096951

## Discrepancy

SPALLING ON GEAR TEETH, THIS IS A RECURRING PROBLEM IN C47B GEARBOXS, WHERE PINION GEARS WEAR PREMATURELY. REPLACED WITH NEW GEAR.

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