# SDR ALG2002F00035

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2002
- Submitted: June 10, 2002
- Operation: Air carrier
- Aircraft: [N577AL](https://openairdocs.org/aircraft/N577AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53247
- Engine: Allsn 250C47B
- System (JASC): [7210 · Turbine Engine Reduction Gear](https://openairdocs.org/jasc/7210)
- Part: Bearing
- Part number: 6895007
- Part serial: JJ16688
- Condition: Galled
- Location: Tm Bearing
- Part time: 682 hours
- Component: Gearbox, Allsn
- Component part number: 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/ALG2002F00035

## Discrepancy

ENGINE WAS REMOVED DUE TO CHIP LIGHT.  GEARBOX WAS DISASSEMBLED TO FIND SOURCE OF METAL.  UPON REMOVAL OF T/M JOURNAL AND INNER RACE FOUND EXCESSIVE GALLING, CAUSING METAL CONTAMINATION.  ASSURE BEARINGS AND INNER RACE CAN WITH STAND HIGH LOADING CAPACITY.

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