# SDR 99ZZZX4038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 18, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N209AL](https://openairdocs.org/aircraft/N209AL), registered now
- Make and model: Bell 206B
- Registry model: [Bell 206B](https://openairdocs.org/model/bell-206b) (OpenAirDocs)
- Aircraft serial: 1044
- System (JASC): [6310 · Engine/Transmission Coupling](https://openairdocs.org/jasc/6310)
- Part: Spring
- Part number: 206040106001
- Condition: Failed
- Location: Main Drive
- Part time: 5,594 hours
- Component: 206040015103
- 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/99ZZZX4038

## Discrepancy

FORWARD COUPLING BECAME DISLODGED FROM PLATE AND WORE HOLES THROUGH THE PLATE.  THIS ALSO CAUSED DAMAGE TO THE TRANSMISSION FLANGE NUT PN 206-040-047-001.  SHOP TEARDOWN REVEALED ONE END OF THE SPRING HAD BROKEN OFF CAUSING THE SPRING TO SHIFT.

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