# SDR QR9R2025032000003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2025
- Submitted: March 20, 2025
- Operation: General aviation
- Make and model: Bolkms BK117C2
- Aircraft serial: 9710
- Aircraft time: 4,740 hours
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Bearing
- Part number: F32827
- Part serial: 1711174
- Condition: Worn
- Location: M/R Head
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2025032000003

## Discrepancy

DURING INSPECTION OF NEEDLE BEARING, MAINTENANCE FOUND THE PROTECTIVE COATING WORN OFF OF BEARING (ROTOR STAR CONTACT POINT) CAUSING DAMAGE TO ROTOR STAR.

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