# SDR HEER20200129626

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2020
- Submitted: January 29, 2020
- Operation: Air carrier
- Filed by: [PHI Aviation, LLC, repair station HEER617E](https://openairdocs.org/faa-repair-station/HEER617E/phi-aviation-llc.md) (OpenAirDocs)
- Aircraft: [N452P](https://openairdocs.org/aircraft/N452P), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53568
- Aircraft time: 6,686 hours
- Engine: Allsn 250C47B
- Engine time: 5,089 hours
- System (JASC): [7240 · Turbine Engine Combustion Section](https://openairdocs.org/jasc/7240)
- Part: Combustion Case
- Part number: M25010404
- Part serial: YL12270
- Condition: Cracked
- Location: Engine
- Part time: 1,100 hours
- 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/HEER20200129626

## Discrepancy

ENGINE REMOVED 12/31/2019 DUE TO SCHEDULE CHANGE FOR TURBINE OVERHAUL (WHEEL RETIREMENTS).  FOUND OUTER COMBUSTION CASE CRACKED AROUND FUEL NOZZLE WELD.  M250-C47 SERIES CEB A-72-6085 REV 3 ENGINE, COMBUSTION ASSEMBLY - INSPECTION OF OUTER COMBUSTION CASE P/N M250-10404 PREVIOUSLY COMPLIED WITH BULLETIN AT 15 HOURS PRIOR TO CRACK AT FUEL NOZZLE BORE.  REPLACED COMBUSTION CASE WITH OVERHAULED PART.

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