What was found
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.
- Difficulty date
- August 28, 2015
- Submitted
- August 24, 2017
- Operation
- General aviation
- Filed by
- CHIR823C
Columbia Helicopters, Inc - Make and model
- Boeing 234
- Aircraft serial
- MJ022
- Aircraft time
- 23,548 hours
- System (JASC)
- 6320 · Main Rotor Gearbox
- 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
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.