# SDR 2005FA0000608

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 6, 2005
- Submitted: April 29, 2005
- Operation: General aviation
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Blade
- Condition: Fatigued
- Location: Compressor Wheel
- Component: Compressor Whee
- Component part number: 38222811
- 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/2005FA0000608

## Discrepancy

THIS IMPELLER HAS EXPERIENCED WHAT LOOKS LIKE HIGH CYCLE FATIGUE WITH A VERY LOW TT ON THE UNIT.  IT APPEARS TO HAVE FAILED DUE TO WHAT STARTED AS A FATIGUE CRACK AND RESULTED IN A LARGE PIECE OF THE IMPELLER COMING OFF.  THIS IMPELLER AND ANOTHER WERE PURCHASED WITHIN 30 DAYS OF EACH OTHER AND HAVE S/N THAT ARE 2 DIGETS OFF FROM THE OTHER.

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