What was found
ENGINE REMOVED 9-13-15 FOR TURBINE O/H. NR 5 BEARING EXHIBITS PROBABLE SPALLING AT OUTER RACE SPLIT. PART WILL BE RETURNED TO MFG FOR FURTHER EVALUATION.
- Difficulty date
- October 9, 2015
- Submitted
- October 9, 2015
- Operation
- General aviation
- Aircraft
- N406PH
- Make and model
- Bell 407
- Aircraft serial
- 53198
- Aircraft time
- 16,992 hours
- Engine
- Allsn 250C47B
- Engine time
- 8,760 hours
- System (JASC)
- 7250 · Turbine Section
- Part
- Bearing
- Part number
- M25010106
- Part serial
- NWF130086
- Condition
- Spalled
- Location
- Turbine
- Part time
- 1,688 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.