What was found
ENGINE REMOVED 11-4-16 DUE TO BROKEN DRILL BIT IN 6&7 OIL PASSAGE. #5 BEARING EXHIBITED SPALLING AT OUTER RACE SPLIT. INSTALLED UPGRADED BEARING.
- Difficulty date
- November 21, 2016
- Submitted
- November 21, 2016
- Operation
- Air carrier
- Aircraft
- N452PH
- Make and model
- Bell 407
- Aircraft serial
- 53457
- Aircraft time
- 12,223 hours
- Engine
- Allsn 250C47B
- Engine time
- 13,733 hours
- System (JASC)
- 7250 · Turbine Section
- Part
- Bearing
- Part number
- M25010106
- Part serial
- NWK150044
- Condition
- Spalled
- Location
- Engine
- Part time
- 282 hours
- Component
- Turbine
- Component part number
- 23063354
- 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.