# SDR CA970408013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Robsin R22BETA
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Bearings
- Part number: A1541
- Condition: Worn
- Location: Mast/Hub
- Part time: 1,708 hours
- Stage of operation: CR
- Nature of condition: E
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA970408013

## Discrepancy

(CAN) VIBRATION REPORTED.  ROTOR HEAD DISMANTLED.  AT THE ATTACHMENT POINT OF THE HUB TO THE MAST, THE BEARINGS (A-106-5 AND A-648-1) AS WELL AS THE RINGS (A-152-1) WERE EXCESSIVELY WORN.  THE TWO BEARINGS (A-648-1) WERE OUT OF ROUND TO THE EXTENT OF DAMAGING THE M/R HUB (A-154-1) BEYOND REPAIR.

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