What was found
SPALLING ON GEAR TEETH, THIS IS A RECURRING PROBLEM IN C47B GEARBOXS, WHERE PINION GEARS WEAR PREMATURELY. REPLACED WITH NEW GEAR.
- Difficulty date
- June 26, 2004
- Submitted
- August 23, 2004
- Operation
- Air carrier
- Aircraft
- N617AL
- Make and model
- Bell 407
- Aircraft serial
- 53265
- Aircraft time
- 5,295 hours
- Engine
- Allsn 250C47B
- Engine time
- 1,895 hours
- System (JASC)
- 6320 · Main Rotor Gearbox
- Part
- Pinion Gear
- Part number
- 6893672
- Part serial
- UG12599
- Condition
- Spalled
- Location
- Gearbox
- Part time
- 765 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.