What was found
ON CLIMBOUT TO CRUISE ALTITUDE PASSING 28,000 FT HEARD A THUD & EXPERIENCED AIRCRAFT YAW TO THE RIGHT. ENGINE INSTRUMENTS INDICATED NR 3 ENGINE FAILURE. SHUT DOWN ENGINE IN ACCORDANCE WITH QRH. FIRED NR 3 ENGINE FIRE EXTINGUISHER PER QRH. RETURNED TO MEM, LANDED RWY 36C. EXPERIENCED SEVERE AIRCRAFT VIBRATION DURING DESCENT UNTIL ENGINE APPEARED TO HAVE SEIZED OR STOPPED ROTATING. PERFORMED SLAT RETRACTED/FLAPS 22 LANDING. ROLLOUT WAS NORMAL. EVACUATED THE A/C USING QRH CHECKLIST. FIRED EXTINGUSHING AGENT TO ALL ENGINES. ITEM IN WORK.