# SDR 97ZZZX1939

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 13, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N600MA](https://openairdocs.org/aircraft/N600MA), registered now
- Make and model: Bell UH-1B
- Registry model: [Bell UH-1B](https://openairdocs.org/model/bell-uh-1b) (OpenAirDocs)
- Aircraft serial: 6413970
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Bearing
- Part number: 2040401431
- Condition: Spalled
- Location: Transmission
- Component: 204040016005
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX1939

## Discrepancy

SPALLING ON BALLS AND OUTER RACE OF BEARING.  THIS BEARING IS USED IN SEVERAL DIFFERENT APPLICATIONS IN THE DRIVE TRAIN OF BELL HELICOPTERS.

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