# SDR CHIR201511172182

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 11, 2015
- Submitted: November 17, 2015
- 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
- Aircraft time: 22,732 hours
- Engine: Lyc AL5512
- System (JASC): [6330 · Main Rotor Transmission Mount](https://openairdocs.org/jasc/6330)
- Part: Bolt
- Part number: BACB30US612
- Condition: Broken
- Location: Zone 400
- Part time: 5,283 hours
- Component: Aft Transmissio, Boeing
- 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/CHIR201511172182

## Discrepancy

DURING DISASSEMBLY OF COMPONENT, SCUFFING ON BOTH THE SPIRAL BEVEL GEAR AND PINION GEAR WAS NOTED.  THE CUSTOMER HAD REPORTED A SINGLE BOLT BROKEN UPON ON-WING TORQUE CHECK INSPECTION AND NO OTHER BOLTS APPEAR CRACKED AFTER DISASSEMBLY.  NDT PENDING RESULTS.  THIS BOLTED JOINT HAS HAD THE UPDATED TORQUE VALUE APPLIED AT LAST SHOP REPAIR.

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