SDR JYD2002F00005

Service difficulty report · Compressor Wheel · Skrsky S64*

Difficulty date: November 6, 2001
Submitted: November 14, 2002
Operation: Air carrier
Aircraft: N164AC
Make and model: Skrsky S64*
Aircraft serial: 64034D
Engine: Pwa JFTD12A4A
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Compressor Wheel
Part number: 712701
Part serial: 3V4176
Condition: Cracked
Location: Center Ring
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FRONT HUB, FOUND CRACKED DURING OVERHAUL INSPECTION. COMPRESSOR WAS REMOVED FROM SERVICE DUE TO REACHING ITS OVERHAUL INTERVAL, HAVING A TSO OF 2987.9 HOURS AND TT OF 5978.0 HOURS. DURING OVERHAUL INSPECTION, TWO CRACKS WERE DETECTED BY CURRENT INSPECTION. CRACK LOCATIONS DETECTED BY EDDY CURRENT WERE IN THE CENTER RING OF FRONT HUB EXTENDING FROM BLADE PIN HOLES AT APPROXIMATELY AT 45 DEGREE ANGLE. CRACKS WERE NOT DETECTABLE BY FLUORESCENT PENETRANT INSPECTION, THUS CRACK LENGTHS WERE NOT MEASUREABLE.