# SDR 2022FA0000410

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2022
- Submitted: July 29, 2022
- Operation: General aviation
- Aircraft: [N1118N](https://openairdocs.org/aircraft/N1118N), registered now
- Make and model: Robsin R22BETAII
- Aircraft serial: 1780
- Aircraft time: 22,446 hours
- System (JASC): [6200 · Main Rotor System](https://openairdocs.org/jasc/6200)
- Part: Bearing
- Part number: A1593
- Part serial: 1913345
- Condition: Brinelled
- Location: M/R Spindle
- Part time: 167 hours
- Component: Spindle Assy, Robsin
- Component part number: A00515
- Stage of operation: DE
- How discovered: C
- Nature of condition: E, F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022FA0000410

## Discrepancy

PILOT REPORTED ABNORMAL AND HEAVY CYCLIC FORCES DURING AUTOROTATION AND LOW POWER DESCENTS. FOUND BOTH MR SPINDLES TO BE BRINELLED. REMOVED SPINDLE ASSEMBLIES FOR FURTHER EVALUATION. INSTALLED NEW A005-15 SPINDLE ASSEMBLIES, TRACKED AND BALANCED MR SYSTEM AND CYCLIC RESPONSE WAS NORMAL.

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