# SDR ULXR201710180001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 14, 2017
- Submitted: October 18, 2017
- Operation: General aviation
- Filed by: [City of Los Angeles-General Services, repair station ULXR905L](https://openairdocs.org/faa-repair-station/ULXR905L/city-of-los-angeles-general-services.md) (OpenAirDocs)
- Aircraft: N701WP
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53542
- Aircraft time: 7,271 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Bevel Gear
- Part number: 407040035101
- Part serial: A1013
- Condition: Failed
- Location: M/R Gearbox
- Part time: 5,845 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ULXR201710180001

## Discrepancy

MAIN ROTOR GEARBOX BEVEL RING GEAR TOOTH FAILURE. THIS IS THE THIRD INCIDENT OF A GEAR TOOTH FAILURE.

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