# SDR QR9R2023020900001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2023
- Submitted: February 9, 2023
- Operation: General aviation
- Filed by: [M1 Support Services, repair station QR9R369D](https://openairdocs.org/faa-repair-station/QR9R369D/m1-support-services.md) (OpenAirDocs)
- Make and model: Bolkms BK117C2
- Aircraft serial: 10721319356
- Aircraft time: 3,542 hours
- System (JASC): [6210 · Main Rotor Blades](https://openairdocs.org/jasc/6210)
- Part: Bearing
- Part number: 601741
- Part serial: NA
- Condition: Cracked
- Part time: 822 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2023020900001

## Discrepancy

DURING INSPECTION OF THE VIBE ABSORBER BALL BEARING, MAINTENANCE FOUND THE BALL BEARING WAS CRACKED ALONG THE CENTER RADIUS. REMOVED AND REPLACED BALL BEARING.

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