# SDR ALGA094181

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2004
- Submitted: April 19, 2004
- Operation: Air carrier
- Aircraft: [N537AL](https://openairdocs.org/aircraft/N537AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53230
- Aircraft time: 3,510 hours
- Engine: Allsn 250C47B
- Engine time: 3,141 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Gear
- Part number: 23071895
- Part serial: NN503386
- Condition: Spalled
- Location: M/R Gearbox
- Part time: 586 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/ALGA094181

## Discrepancy

GEAR HAS HEAVY SPALLING.  REMOVED AND REPLACED W/SERVICEABLE PART.

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