What was found
THE CONNECTING BOLT WAS REMOVED FROM THE ROTOR HEAD AND A HAIR LINE CRACK WAS FOUND UNDER THE HEAD OF THE BOLT DURING A VISUAL INSPECTION. THE CRACK WAS CONFIRMED BY AN NDT INSPECTION.
- Difficulty date
- May 21, 2012
- Submitted
- May 21, 2012
- Operation
- General aviation
- Aircraft
- N242CH
- Make and model
- Boeing 234
- Aircraft serial
- MJ023
- System (JASC)
- 6220 · Main Rotor Head
- Part
- Bolt
- Part number
- 114R22012
- Part serial
- C1X010
- Condition
- Sheared
- Location
- Aft Rotor Head
- Part time
- 378 hours, 175 cycles
- Component
- Rotor Head · Boeing
- Component part number
- 414R200219
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.