As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
During C-Check in CVG, during Tailpipe removal for Inspection, noted crack in casing 1 1/2" Aft of 4th Turbine Wheel at 1 o'clock position. Dimensions 3.500 L. Maintenance removed Engine SN LF07643, Installed new Engine SN/LF07629 refer to Task Card 7100-502 Power Plant removal and installation.