What was found
METAL WAS FOUND ON CHIP PLUGS, ENGINE AND GEARBOX DISASSEMBLED FOR INSPECTION. FOUND CAUSE FOR METAL DUE TO INNER RACE GALLING ON T/M JOURNAL BEARING, CAUSING METAL CONTAMINATION THROUGHOUT GEARBOX.
- Difficulty date
- September 30, 2001
- Submitted
- March 4, 2002
- Operation
- Air carrier
- Aircraft
- N577AL
- Make and model
- Bell 407
- Aircraft serial
- 53247
- Engine
- Allsn 250C47B
- System (JASC)
- 6320 · Main Rotor Gearbox
- Part
- Bearing
- Part number
- 6895007
- Part serial
- JJ14597
- Condition
- Making Metal
- Location
- M/R Gearbox
- Part time
- 2,105 hours
- Component
- Gearbox · Allsn
- Component part number
- 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.