As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 727 FROM DFW TO TOL. ON TAKEOFF, THE NR 3 ENGINE HAD STRONG VIBRATION. IN-FLIGHT SHUTDOWN OF THE NR 3 ENGINE AS A PRECAUTIONARY ADVISED ATC DECLARED EMERGENCY AND AIR TURN BACK TO DFW. AIRCRAFT WAS INSPECTED AND FOUND FAILURE OF TURBINE SECTION PER EVIDENCE OF MISSING DAMAGE TURBINE BLADES. REPLACED THE NR 3 ENGINE PER B727 MM 71-00 AND AIRCRAFT RETURNED TO SERVICE.