CONSUMER'S BROTHER WAS DRIVING 55-70 MPH ON STATE HWY 72 WHEN STEERING MADE A FULL CIRCLE THEN A CLICKING NOISE, THE PASSENGER SAID THAT THEY THEN REALIZED THAT STEERING WHEEL HAD LOCKED UP FOLLOWING LOSS OF CONTROL. THE TRUCK THEN FLIPPED OVER BACK END OVER FRONT THEN ROLLED OVER ON SIDE, LOOSING BOTH LEFT WHEELS, BRAKES/DRUMS/PADS AND TIRES. THE DRIVER WAS THROWN FROM TRUCK AFTER THE 2ND FLIP FORWARD, HE WAS REVIVED ON SCENE, THEN LATER DIED IN FLIGHT TO HOSPITAL. PASSENGER SURVIVED WITH MINOR UPPER BODY INJURIES. *AK