# SDR QS72004F00001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2003
- Submitted: February 9, 2004
- Operation: Air carrier
- Aircraft: N921RB
- Make and model: Bell 206B
- Registry model: [Bell 206B](https://openairdocs.org/model/bell-206b) (OpenAirDocs)
- Aircraft serial: 2624
- Engine: Allsn 250C*
- System (JASC): [6310 · Engine/Transmission Coupling](https://openairdocs.org/jasc/6310)
- Part: Coupling
- Part number: 212040687001
- Condition: Worn
- Location: M/R Driveshaft
- Component: Driveshaft, Bell
- Component part number: 2120401103
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QS72004F00001

## Discrepancy

RECEIVED FROM MFG AS NEW, COUPLING HAS ROUGH WEAR PATTERNS ON THE TEETH, SHOWS EVIDENCE OF BEING INSTALLED ON A SHAFT, AND HAS A WEAR PATTERN WHERE THE SEAL WOULD NORMALLY RIDE.  BELL HAS RECENTLY  IMPOSED A 3000 HOUR OVERHAUL OF THE DRIVESHAFT, PART RECEIVED WITHOUT HISTORICAL SERVICE RECORD.  SN A5000.

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