What was found
MAIN ROTOR MAST LINER HAS PITTING CORROSION BEYOND LIMITS.
- Difficulty date
- March 20, 2012
- Submitted
- March 22, 2012
- Operation
- Air carrier
- Aircraft
- N447AL
- Make and model
- Bell 407
- Aircraft serial
- 53126
- Aircraft time
- 9,804 hours
- Engine
- Allsn 250C47B
- System (JASC)
- 6230 · Main Rotor Mast/Swashplate
- Part
- Liner
- Part number
- 406040092101
- Condition
- Corroded
- Location
- Mast
- Component
- Mast Assy · Bell
- Component part number
- 407040011107FM
- 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.