What was found
(CAN) DURING SCHEDULED MAINTENANCE OF TAIL ROTOR DRIVESHAFT, NEW BOLTS AND NUTS BEING INSTALLED, A NEW NUT WAS FOUND TO HAVE NO SELF LOCKING ABILITY ON ANY BOLT NEW OR OLD. SUSPECT MFG DEFECT.
- Difficulty date
- March 26, 2013
- Submitted
- September 14, 2015
- Operation
- General aviation
- Make and model
- Bell 204B
- Aircraft time
- 19,026 hours
- Engine
- Lyc T5311B
- System (JASC)
- 6510 · Tail Rotor Drive Shaft
- Part
- Nut
- Part number
- 52Z1835048
- Condition
- Damaged
- Location
- Tail Rotor Drive
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.