# SDR CA021007010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2002
- Submitted: October 28, 2002
- Operation: Air carrier
- Make and model: Bolkms BK117B2
- Engine: Lyc LTS101750B1
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Rod End
- Part number: 10513143
- Condition: Worn
- Location: Main Rotor
- Stage of operation: HO
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA021007010

## Discrepancy

(CAN) PILOT NOTICED UNUSUAL VERTICAL VIBRATION IN HOVER AND LANDED IMMEDIATELY.  MAINTENANCE DICOVERED BLUEMAIN ROTOR ROTATING CONTROL ROD LOWER ROD END BEARING HAD EXCESSIVE PLAY.  THIS WASDUE TO 1/3TH OF THE SPHERICAL BEARING OUTER RACE WORN AWAY.  SPHERICAL BALL BEARING HAD BEEN NEARLY CONTACTING THE ROD END. ROD END REPLACED,  A/C TRACKED AND RETURNED TO SERVICE.

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