As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HIGH PRESSURE TURBINE ROTOR FORWARD SEAL RADIAL CRACK, LENGTH=160MM, WIDTH=1MM, DEPTH=35MM. DEFECT IDENTIFIED DURING ENGINE DISASSEMBLY AND IMMEDIATELY REPORTED TO THE ENGINE OEM. OEM HAS PREVIOUSLY INITIATED FAA NOTIFICATION AND DEFECT INVESTIGATION IS ON-GOING. REFER TO OEM FDM CORRESPONDENCE NR GE90115B-13-005.