What was found
SECOND STAGE COMPRESSOR DISK WAS 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, 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 AT 45 DEGREE ANGLE. CRACKS WERE NOT DETECTABLE BY FLUORESCENT PENETRANT INSPECTION, THUS CRACK LENGTHS WERE NOT MEASUREABLE.