What was found
DURING MAIN ROTOR HUB REMOVAL, NOTED THE MAIN ROTOR MAST FLANGE WAS CRACKED. THE MAST FLANGE WAS FOUND CRACKED APPROXIMATELY THREE-FOURTHS AROUND. THE CRACK WAS NEAR THE RADIUS OF THE FLANGE AND THE STUD HOLES.
- Difficulty date
- July 18, 1997
- Submitted
- March 26, 2000
- Operation
- General aviation
- Aircraft
- N501AL
- Make and model
- Bolkms BO105C
- Aircraft serial
- S58
- System (JASC)
- 6230 · Main Rotor Mast/Swashplate
- Part
- Rotor Mast
- Part number
- 4619305032
- Condition
- Cracked
- Location
- Transmission
- Part time
- 7,071 hours
- Component
- 4638001004
- 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.