# SDR 2022FA0000413

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 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: 22,497 hours
- System (JASC): [6200 · Main Rotor System](https://openairdocs.org/jasc/6200)
- Part: Bearing
- Part number: A1593
- Part serial: 215984
- Condition: Brinelled
- Location: M/R Spindle
- Part time: 50 hours
- Component: Mr 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/2022FA0000413

## Discrepancy

PILOT REPORTED ABNORMAL AND HEAVY CYCLIC FORCES DURING AUTOROTATION AND LOW POWER DESCENTS. FOUND BOTH MR SPINDLES TO BE BRINELLED. REMOVED SPINDLE ASSEMBLIES AND PERFORMED MR SPINDLE BEARING REPLACEMENT IAW RHC COMPONENT MAINTENANCE MANUAL.  (NEW NHBB MANUFACTURED BEARING SET INSTALLED) REINSTALLED MR BLADE AND SPINDLE ASSEMBLIES, TRACKED AND BALANCED MR SYSTEM AND CYCLIC RESPONSE WAS NORMAL.

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