What was found
DURING FLIGHT, EXPERIANCED A MAIN ROTOR VIBRATION, PRECAUTIONARY LANDING MADE. NORMAL SHUTDOWN. MX INSPECTED AND FOUND SHEAR BEARING ON MAIN ROTOR HEAD DELAMINATING.
- Difficulty date
- July 29, 2013
- Submitted
- July 30, 2013
- Operation
- Air carrier
- Aircraft
- N407SM
- Make and model
- Bell 407
- Aircraft serial
- 53289
- Aircraft time
- 6,976 hours, 30,035 cycles
- Engine
- Allsn 250C47B
- Engine time
- 6,242 hours, 16,365 cycles
- System (JASC)
- 6220 · Main Rotor Head
- Part
- Bearing
- Part number
- 407310101105
- Part serial
- LK15458
- Condition
- Delaminated
- Location
- Main Rotor Hub
- Part time
- 1,104 hours
- Component
- Hub · Bell
- Component part number
- 407010100115FM
- Stage of operation
- AA
- How discovered
- O
- Nature of condition
- E
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.