What was found
FOUND EXCESSIVE GALLING ON PINION GEAR, SPALLING AND GALLING ON T/M GEAR. BOTH GEARS HAVE VERY UNUSUAL WEAR PATTERN. ENTRY MADE BY RNB
- Difficulty date
- May 28, 2002
- Submitted
- June 10, 2002
- Operation
- Air carrier
- Aircraft
- N577AL
- Make and model
- Bell 407
- Aircraft serial
- 53247
- Aircraft time
- 4,769 hours
- Engine
- Allsn 250C47B
- System (JASC)
- 7210 · Turbine Engine Reduction Gear
- Part
- Pinion Gear
- Part number
- 6893672
- Part serial
- NN78497
- Condition
- Galled
- Location
- Gearbox
- Part time
- 683 hours
- Component
- Gearbox · 23063393
- 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.