# SDR CHIR201409191728

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 18, 2014
- Submitted: September 19, 2014
- Operation: General aviation
- Filed by: [Columbia Helicopters, Inc, repair station CHIR823C](https://openairdocs.org/faa-repair-station/CHIR823C/columbia-helicopters-inc.md) (OpenAirDocs)
- Make and model: Boeing 234
- Registry model: [Boeing 234](https://openairdocs.org/model/boeing-vertol-234) (OpenAirDocs)
- Aircraft serial: MJ0017
- System (JASC): [6300 · Main Rotor Drive System](https://openairdocs.org/jasc/6300)
- Part: Liner
- Part number: 114D31027
- Part serial: TS508
- Condition: Cracked
- Location: Bearing
- Stage of operation: IN
- How discovered: D
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHIR201409191728

## Discrepancy

DURING NDT PROCESS OF 234 AFT VERTICAL SHAFT BEARING HOUSING, CRACK FOUND ON BEARING LINER LAND AT 3 O`CLOCK POSITION, APPROXIMATELY .2500" LONG.

---
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.