What was found
DURING REMOVAL OF THE TAIL ROTOR GEARBOX FOR TBO CHANGE, WE FOUND THAT THE ATTACHING STUD WAS SHEARED OFF AT THE TAIL BOOM ATTACHMENT POINT.
- Difficulty date
- September 21, 2016
- Submitted
- September 21, 2016
- Operation
- Air carrier
- Aircraft
- N145NC
- Make and model
- Bolkms BK117C2
- Aircraft serial
- 9542
- Aircraft time
- 2,032 hours
- Engine
- Tmeca ARRIEL1E2
- System (JASC)
- 6520 · Tail Rotor Gearbox
- Part
- Gearbox
- Part number
- 4639003011
- Part serial
- 1532
- Condition
- Broken
- Location
- Tailboom
- Part time
- 2,032 hours
- 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.