What was found
HEX BOLT FAILED NDI INSPECTION. CRACKED IN THREAD AREA AROUND COTTER KEY HOLE.
- Difficulty date
- May 28, 2026
- Submitted
- May 28, 2026
- Operation
- General aviation
- Filed by
- QR9R369D
M1 Support Services - Make and model
- Bolkms BK117C2
- Aircraft serial
- 9753
- Aircraft time
- 4,688 hours
- System (JASC)
- 6220 · Main Rotor Head
- Part
- Bolt
- Part number
- B621M1061202
- Part serial
- 4483
- Condition
- Cracked
- Location
- Main Rotor
- Stage of operation
- IN
- How discovered
- M
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.