# SDR JYD2004F00004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2003
- Submitted: February 4, 2004
- Operation: Air carrier
- Aircraft: [N164AC](https://openairdocs.org/aircraft/N164AC), registered now
- Make and model: Skrsky S64E
- Aircraft serial: 64034D
- Aircraft time: 13,248 hours
- Engine: Pwa JFTD12A4A
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Compressor Wheel
- Part number: 670802
- Part serial: H63817
- Condition: Cracked
- Location: Engine
- Part time: 5,978 hours, 3,760 cycles
- 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/JYD2004F00004

## Discrepancy

2ND STAGE COMPRESSOR DISK (PN 670802, SN H63817) WAS FOUND CRACKED DURING OVERHAUL INSPECTION.  COMPRESSOR (SN 672571) WAS REMOVED FROM SERVICE DUE TO REACHING ITS O/H INTERVAL, HAVING A TSO OF 2987.9 HOURS AND A TT OF 5978.0 HOURS.  DURING O/H INSPECTION, FIVE CRACKS WERE DETECTED BY EDDY CURRENT INSPECTION.  CRACK LOCATIONS DETECTED BY EDDY CURRENT WERE IN THE CENTER RING OF DISK EXTENDING FROM BLADE PIN HOLES AT APPROXIMATELY A 45 DEGREE ANGLE.  CRACKS WERE NOT DETECTABLE BY FLUORESCENT PENETRANT INSPECTION, THUS CRACK LENGTHS WERE NOT MEASURABLE.

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