# SDR AU981001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Snias AS350B
- Engine: Tmeca ARRIEL1B
- System (JASC): [6230 · Main Rotor Mast/Swashplate](https://openairdocs.org/jasc/6230)
- Part: Lockplate
- Part number: 350A37118322
- Condition: Cracked
- Location: M/R Mast
- Component: 350A3710760
- 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/AU981001

## Discrepancy

(AUS) MAIN ROTOR MAST BEARING LOCKPLATE CRACKED.  SUSPECT LOSS OF TORQUE LOADING ON MAST BEARING CAUSED VIBRATION LEADING TO THE LOOSE AND SHEARED RIVETS ON THE SWASHPLATE SUPPORT.

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