# SDR CHI1773

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N239CH](https://openairdocs.org/aircraft/N239CH), registered now
- Make and model: Boeing 234
- Registry model: [Boeing 234](https://openairdocs.org/model/boeing-vertol-234) (OpenAirDocs)
- Aircraft serial: MJ006
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Sleeve
- Part number: 234R21973
- Condition: Broken
- Location: M/R Head
- Part time: 1,058 hours
- Component: 234R21971
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHI1773

## Discrepancy

THE HORIZONTAL HINGE PIN WAS REMOVED FOR A LEAKING SEAL.  THE HINGE PIN WAS REMOVED AND THE LEADING SLEEVE REMAINED IN THE BEARING.  THE SLEEVE WAS SPLIT AND THE BEARING WAS REMOVED WITH THE SLEEVE STILL INSTALLED.  A NEW BEARING AND HORIZONTAL HINGE PIN WERE INSTALLED.  THE ROTOR HEAD ASSY A5-1503 HAS ACCUMULATED 212 HOURS SINCE CENTER HUB REPLACEMENT.  (X)

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