What was found
SPALLING ON GEAR TEETH. THIS IS A NEW STYLE GEAR AND THIS GEARBOX WAS REMOVED FOR HIGH VIBES. THIS IS A RECURRING EVENT ON C-47 GEARBOXES. REPLACED GEAR W/NEW PART.
- Difficulty date
- June 10, 2004
- Submitted
- June 14, 2004
- Operation
- Air carrier
- Aircraft
- N487AL
- Make and model
- Bell 407
- Aircraft serial
- 53204
- Aircraft time
- 3,905 hours
- Engine
- Allsn 250C47B
- Engine time
- 2,105 hours
- System (JASC)
- 6320 · Main Rotor Gearbox
- Part
- Gear
- Part number
- 23077527
- Part serial
- UG12723
- Condition
- Spalled
- Location
- M/R Gearbox
- Part time
- 134 hours
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.