# SDR CHIR123020162689

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 30, 2016
- Submitted: December 30, 2016
- Operation: General aviation
- Aircraft: P2CHK
- Make and model: Boeing 234
- Registry model: [Boeing 234](https://openairdocs.org/model/boeing-vertol-234) (OpenAirDocs)
- Aircraft serial: MJ006
- System (JASC): [6300 · Main Rotor Drive System](https://openairdocs.org/jasc/6300)
- Part: Stud
- Part number: BACB30US612
- Condition: Broken
- Location: Transmission
- Component: Transmission
- Component part number: 234D22004
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHIR123020162689

## Discrepancy

WHEN PAN WAS REMOVED TO PERFORM A SPIRAL BEVEL INSPECTION, MECHANIC FOUND THE NR 9 STUD BROKEN OFF AND LAYING IN THE AUX OIL SUMP PRIOR TO BEGINNING TORQUE CHECK. TRANSMISSION IS BEING REMOVED AND REPLACED.

---
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.