What was found
ENGINE REMOVED 11-16-14 FOR TURBINE OVERHAUL. NR 5 BEARING REMOVED FOR PROBABLE SPALLING AT OUTER RACE SPLIT. REPLACED BEARING. PART WILL BE RETURNED TO MFG FOR FURTHER EVALUATION.
- Difficulty date
- November 21, 2014
- Submitted
- November 21, 2014
- Operation
- General aviation
- Aircraft
- N442PH
- Make and model
- Bell 407
- Aircraft serial
- 54089
- Aircraft time
- 4,157 hours
- Engine
- Allsn 250C47B
- Engine time
- 1,985 hours
- System (JASC)
- 7250 · Turbine Section
- Part
- Bearing
- Part number
- M25010106
- Part serial
- NWA140702
- Condition
- Spalled
- Location
- Turbine
- Part time
- 403 hours
- Component
- Turbine Assy
- 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.