What was found
NR 5 TURBINE BEARING EXHIBITS SPALLING ON OUTER RACE AND ON SEVEN BALLS. REPLACED THE NR 5 BEARING.
- Difficulty date
- November 22, 2016
- Submitted
- November 23, 2016
- Operation
- Air carrier
- Aircraft
- N420PH
- Make and model
- Bell 407
- Aircraft serial
- 53747
- Aircraft time
- 9,931 hours
- Engine
- Allsn 250C47B
- Engine time
- 14,741 hours
- System (JASC)
- 7250 · Turbine Section
- Part
- Bearing
- Part number
- M25010106
- Part serial
- NWF151760
- Condition
- Spalled
- Location
- Turbine
- Part time
- 915 hours
- 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.