# SDR ALG2003F00070

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2002
- Submitted: July 28, 2003
- Operation: Air carrier
- Aircraft: [N547AL](https://openairdocs.org/aircraft/N547AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53240
- Engine: Allsn 250C47B
- System (JASC): [6510 · Tail Rotor Drive Shaft](https://openairdocs.org/jasc/6510)
- Part: Bearing
- Part number: 407340339101
- Part serial: ZV11374
- Condition: Failed
- Location: T/R Driveshaft
- Part time: 66 hours
- Component: Driveshaft
- Component part number: 407040303109
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ALG2003F00070

## Discrepancy

DURING CRUISE FLIGHT THE PILOT FELT A SEVERE VIBRATION IN THE AIRFRAME AND PERFORMED A PRECAUTIONARY LANDING ON A NEARBY PLATFORM.  FORWARD BEARING ON NR 2 TAILROTOR DRIVESHAFT BLOWER ASSEMBLY FAILED.

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