# SDR ALG2002F00012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 25, 2002
- Submitted: February 21, 2002
- Operation: Air carrier
- Aircraft: [N937AL](https://openairdocs.org/aircraft/N937AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53383
- Engine: Allsn 250C47B
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Bearing
- Part number: 23066678
- Part serial: MP00480
- Condition: Improper Part
- Location: M/R Gearbox
- Part time: 3,190 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ALG2002F00012

## Discrepancy

UPON REPAIRS OF GEARBOX, BEARING RACE HAVING TWO SERIAL NUMBERS ETCHED ON RACE. TO PREVENT RECURRENCE: PROPER IDENTIFICATION OF PART BEFORE LEAVING FACTORY.

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