What was found
(CAN) WHILE UNDOING THE NUT AS PART OF MAINTENANCE, THE NUT FAILED INTO 2 HALVES. MINIMAL TORQUE WAS APPLIED. THERE IS EVIDENCE OF A PRE-EXISTING CRACK. THE NUT WAS REPLACED AND TORQUED TO MFG SPECIFICATIONS.
- Difficulty date
- May 14, 2012
- Submitted
- September 14, 2015
- Operation
- General aviation
- Make and model
- Bell 206B3
- System (JASC)
- 6420 · Tail Rotor Head
- Part
- Nut
- Part number
- NAS1022A8
- Condition
- Fractured
- Location
- Tail Rotor
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.