What was found
TURBINE REMOVED 5-19-16 FOR METAL IN OIL. REMOVED NR 5 BEARING DUE TO PROBABLE SPALLING ON OUTER RACE AT SPLIT. INSPECTED BEARING FOUND SPALLING ON OUTER RACE AT SPLIT. SCRAP PART AND REPLACED WITH NEW.
- Difficulty date
- May 31, 2016
- Submitted
- June 1, 2016
- Operation
- General aviation
- Aircraft
- N348A
- Make and model
- Bell 407
- Aircraft serial
- 53586
- Aircraft time
- 2,453 hours
- Engine
- Allsn 250C47B
- Engine time
- 2,645 hours
- System (JASC)
- 7250 · Turbine Section
- Part
- Bearing
- Part number
- M25010106
- Part serial
- NWK120973
- Condition
- Spalled
- Location
- Nr 5
- Part time
- 449 hours
- Component
- Turbine
- Component part number
- M25010557
- 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.