# SDR H44R2017082400006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2017
- Submitted: August 28, 2017
- Operation: General aviation
- Filed by: [Helicopter Flight Services Inc, repair station H44R404H](https://openairdocs.org/faa-repair-station/H44R404H/helicopter-flight-services-inc.md) (OpenAirDocs)
- Aircraft: [N401TD](https://openairdocs.org/aircraft/N401TD), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 54335
- Aircraft time: 3,160 hours, 11,744 cycles
- Engine: Allsn 250C47B
- Engine time: 2,972 hours, 3,324 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Making Metal
- Stage of operation: TX
- How discovered: O
- Nature of condition: E
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/H44R2017082400006

## Discrepancy

AFTER COMPLETION OF THE ENGINE 150 HOUR INSPECTION, A GROUND RUN WAS ACCOMPLISHED. DURING THE GROUND RUN AN UNUSUAL NOISE WAS HEARD, DESCRIBED AS A ANGRY VACUUM CLEANER. THE ENGINE CHIP PLUGS WERE PULLED AND A SIGNIFICANT AMOUNT OF METAL WAS FOUND ON THEM.

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