As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DETAIL INSP OF THE HPT ROTOR STAGE 1 DISC, MULTIPLE CRACK INDICATIONS HAVE BEEN NOTED ON AND BETWEEN THE ID BAYONET TAB FEATURES AT 4 OFF LOCATIONS. THE FPI INDICATIONS HAVE BEEN MEASURED UP TO 0.050 INCH IN LENGTH. THIS HAS BEEN CAUSED BY THE MATING HPT BORE INTERSTAGE SEAL ROTATING BEYOND ITS LOCKING MECHANISM. ROOT CAUSE IS CURRENTLY BEING INVESTIGATED. (K)