# SDR 2017FA0000646

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2017
- Submitted: December 17, 2017
- Operation: General aviation
- Aircraft: [N810BK](https://openairdocs.org/aircraft/N810BK), registered now
- Make and model: Robsin R44RAVENII
- Aircraft serial: 11051
- Aircraft time: 996 hours
- Engine: Lyc IO540A1A5
- Engine time: 996 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Drive Shaft
- Part number: C1664
- Part serial: 3573
- Condition: Sheared
- Location: M/R Gearbox
- Part time: 996 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: E, F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2017FA0000646

## Discrepancy

THE CLUTCH SHAFT SHEARED IN HALF DURING FLIGHT.

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