What was found
ENGINE WAS REMOVED DUE TO FLUCTUATING OIL PRESSURE. NR 5 BEARING EXHIBITED SPALLING AT OUTER RACE SPLIT. REPLACED WITH SERVICEABLE PART.
- Difficulty date
- December 30, 2011
- Submitted
- January 10, 2012
- Operation
- Air carrier
- Aircraft
- N420PH
- Make and model
- Bell 407
- Aircraft serial
- 53747
- Aircraft time
- 5,014 hours
- Engine
- Allsn 250C47B
- Engine time
- 6,530 hours
- System (JASC)
- 7250 · Turbine Section
- Part
- Bearing
- Part number
- 6871505
- Part serial
- MP091583
- Condition
- Spalled
- Location
- Turbine
- Part time
- 893 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.