# SDR CHIR2017082300057

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2015
- Submitted: August 24, 2017
- Operation: General aviation
- Filed by: [Columbia Helicopters, Inc, repair station CHIR823C](https://openairdocs.org/faa-repair-station/CHIR823C/columbia-helicopters-inc.md) (OpenAirDocs)
- Aircraft: P2CHJ
- Make and model: Boeing 234
- Registry model: [Boeing 234](https://openairdocs.org/model/boeing-vertol-234) (OpenAirDocs)
- Aircraft serial: MJ022
- Aircraft time: 23,548 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Bolt
- Part number: BACB30US6L2
- Condition: Cracked
- Location: Zone 400
- Component: Transmission, Boeing
- Component part number: 234D22004
- Stage of operation: IN
- How discovered: C
- Nature of condition: G
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHIR2017082300057

## Discrepancy

ENGINEERING DEPARTMENT, THE THEN CURRENT BOLTS WERE REPLACED WITH PREVIOUS FASTENERS.  IN THE INTERVENING 5 MONTHS, NO FURTHER ERRORS HAVE BEEN DETECTED. THESE ASSEMBLIES ARE INSPECTED AT 50 HR. INTERVALS IAW SB 234-63-0001 R0.


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