# SDR HEER20170315061

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2017
- Submitted: March 15, 2017
- Operation: Air carrier
- Filed by: [PHI Aviation, LLC, repair station HEER617E](https://openairdocs.org/faa-repair-station/HEER617E/phi-aviation-llc.md) (OpenAirDocs)
- Aircraft: [N421PH](https://openairdocs.org/aircraft/N421PH), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53749
- Aircraft time: 9,731 hours
- Engine: Allsn 250C47B
- Engine time: 1,516 hours
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Bearing
- Part number: M25010106
- Part serial: NWA160357
- Condition: Spalled
- Location: Turbine
- Part time: 463 hours
- Component: Turbine, Allsn
- Component part number: M25010557
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEER20170315061

## Discrepancy

ENGINE REMOVED FOR A NR 5 BEARING UPGRADE.  THE NR 5 BEARING EXHIBITS SPALLING AT SPLIT.  INSTALLED A NEW BEARING.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.