# SDR HEEA077874

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2002
- Submitted: February 25, 2002
- Operation: Air carrier
- Aircraft: N4999
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53323
- Aircraft time: 3,021 hours
- System (JASC): [6310 · Engine/Transmission Coupling](https://openairdocs.org/jasc/6310)
- Part: Shaft
- Part number: 406040516101
- Part serial: AFS1267
- Condition: Worn
- Location: Freewheel Unit
- Component: Freewheel Unit, 406040500123
- 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/HEEA077874

## Discrepancy

FREEWHEEL UNIT SHAFT HAS SPLINES WORN.

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