# SDR CHIR201205212201

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 21, 2012
- Submitted: May 21, 2012
- Operation: General aviation
- Aircraft: [N242CH](https://openairdocs.org/aircraft/N242CH), registered now
- Make and model: Boeing 234
- Registry model: [Boeing 234](https://openairdocs.org/model/boeing-vertol-234) (OpenAirDocs)
- Aircraft serial: MJ023
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Bolt
- Part number: 114R22012
- Part serial: C1X010
- Condition: Sheared
- Location: Aft Rotor Head
- Part time: 378 hours, 175 cycles
- Component: Rotor Head, Boeing
- Component part number: 414R200219
- 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/CHIR201205212201

## Discrepancy

THE CONNECTING BOLT WAS REMOVED FROM THE ROTOR HEAD AND A HAIR LINE CRACK WAS FOUND UNDER THE HEAD OF THE BOLT DURING A VISUAL INSPECTION. THE CRACK WAS CONFIRMED BY AN NDT INSPECTION.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.