What was found
(CAN) THE ENGINEER WAS TROUBLESHOOTING A MAIN ROTOR VIBRATION WHEN IT WAS DISCOVERED VISUALLY, A DELAMINATION OF THE RUBBER COMPOUND OF THE SHEAR BEARING, S/N LK14771, TO SPINDLE.
- Difficulty date
- September 13, 2011
- Submitted
- January 23, 2013
- Operation
- Air carrier
- Make and model
- Bell 407
- Aircraft time
- 1,631 hours
- Engine
- Allsn 250C47B
- System (JASC)
- 6220 · Main Rotor Head
- Part
- Bearing
- Part number
- 407310101105
- Condition
- Delaminated
- Location
- M/R Hub
- Part time
- 2,036 hours
- Component
- M/R Hub Assy
- Component part number
- 407010100123
- 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.