# SDR CHIR2015062500001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 24, 2015
- Submitted: June 25, 2015
- Operation: General aviation
- Filed by: [Columbia Helicopters, Inc, repair station CHIR823C](https://openairdocs.org/faa-repair-station/CHIR823C/columbia-helicopters-inc.md) (OpenAirDocs)
- 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
- Aircraft time: 21,791 hours
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Housing
- Part number: 145R207511
- Part serial: UW3945
- Condition: Cracked
- Location: Rotor Head
- Part time: 7,851 hours
- 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/CHIR2015062500001

## Discrepancy

A POST REPAIR FLOURESCENT PENETRANT INSPECTION WAS PERFORMED ON A PITCH HOUSING AFTER SOME MINOR BLENDING TO REMOVE PITTING.  AN INDICATION OF A CRACK WAS DISCOVERED ON THE OTBD RADIUS OF THE TT PIN BORE.

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