# SDR SW152001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2001
- Submitted: March 28, 2001
- Operation: General aviation
- Aircraft: N1575
- Make and model: Bell 47
- Registry model: [Bell 47](https://openairdocs.org/model/bell-47) (OpenAirDocs)
- Aircraft time: 11,806 hours
- System (JASC): [6510 · Tail Rotor Drive Shaft](https://openairdocs.org/jasc/6510)
- Part: Shaft
- Part number: 476441809
- Condition: Failed
- Location: Tail Rotor
- Stage of operation: UK
- How discovered: O
- Nature of condition: D, F
- Precautionary procedure: B, R
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SW152001

## Discrepancy

TAIL ROTOR DRIVE FAILURE. TAIL ROTOR FORWARD SHAFT, AFT COUPLING FAILURE.  LOSS OF LUBRICATION DUE TO STRIPPED TREADS ON SCREW ILLUSTRATED PARTS BREAKDOWN.

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