What was found
(CAN) CRACKS IN THE PINION GEAR WERE FOUND BY NDT DURING THE O/H OF THE MAIN TRANSMISSION. ASB 407-12-98 WAS RELEASED TO REQUIRE A 1-TIME INSPECTION OF THE PINION GEAR.
- Difficulty date
- December 28, 2010
- Submitted
- September 14, 2015
- Operation
- General aviation
- Make and model
- Bell 407
- System (JASC)
- 6320 · Main Rotor Gearbox
- Part
- Pinion Gear
- Part number
- 406040095101
- Condition
- Cracked
- Location
- Transmission
- Part time
- 4,473 hours
- Component
- Transmission · Bell
- Component part number
- 407040006107
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.