What was found
ON CLIMB-OUT TO CRUISE, ALTITUDE PASSING 28000' HEARD A "THUD" AND EXPERIENCED AIRCRAFT YAW TO THE RIGHT. ENGINE INSTRUMENTS INDICATED NR 3 ENGINE FAILURE. SHUT DOWN ENGINE IN ACCORDANCE WITH QRH. FIRE EXTINGUSHING AGENT TO NR 3 ENGINE PER QRH, RETURNED TO MEMPHIS, LANDED RWY 36C. EXPERIENCED SEVERE AIRCRAFT VIB DURING DESCENT UNTIL ENGINE APPEARED TO HAVE SEIZED OR STOPPED ROTATING. UPON INSPECTION OF ENGINE NOTED THE LOW PRESSURE TURBINE (LPT) WAS MISSING. DAMAGED TO WING AND FUSLAGE AND 3 PYLON.