As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A ROUTINE INSP, DISCOVERED A 2.5" CRACK IN THE ENGINE CASE RUNNING FWD FROM NR 5 C4L BASE TO THE FRONT BEARING AREA. THE CRANK WAS ALLOWING ENGINE OIL SEEPAGE AT THE CRACK AREA. THE ENGINE WAS REMOVED FROM SERVICE AND SENT TO O/H.