# SDR ALG2002F00047

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2002
- Submitted: July 2, 2002
- Operation: Air carrier
- Aircraft: [N403AL](https://openairdocs.org/aircraft/N403AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53478
- Engine: Allsn 250C47B
- System (JASC): [7210 · Turbine Engine Reduction Gear](https://openairdocs.org/jasc/7210)
- Part: Pinion Gear
- Part number: 6893672
- Part serial: NN78424
- Condition: Worn
- Location: Gearbox
- Part time: 752 hours
- 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/ALG2002F00047

## Discrepancy

UPON DISASSEMBLY OF GEARBOX.  UPON DISASSEMBLY OF GEARBOX FOUND EXCESSIVE GALLING AND SPALLING AND WEAR IN GEAR TEETH AND UNEVEN WEAR AND HEAVY SPALLING OF T/M GEAR TEETH.  ASSURE PROPER MESHING OF GEAR TEETH.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.