What was found
BEARING INNER RACE SHOULDER WORN ON ONE SIDE DUE TO LOST TORQUE OF NUT P/N MS14145L5 WHICH WAS CAUSED BY THE LACK OF THREADS ON THIS NUT OR WASHER P/N AN960-516 NOT CONTACTING THE PITCH HORN FULLY. AS NOTED IN ASB 412-98-92.
- Difficulty date
- April 15, 1998
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N2261D
- Make and model
- Bell 412
- Aircraft serial
- 33076
- System (JASC)
- 6220 · Main Rotor Head
- Part
- Bearing
- Part number
- 412010182101
- Condition
- Worn
- Location
- M/R
- Part time
- 248 hours
- Stage of operation
- IN
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.