DT: ABOUT 300 MILES WHILE DRIVING STEERING WHEEL CAME LOOSE, AND CAUSED LOSS OF VEHICLE CONTROL. AT 537 MILES, WHILE MAKING A RIGHT HAND TURN AND THEN A LEFT TURN, AS DRIVER ATTEMPTED TO STRAIGHTEN THE VEHICLE STEERING WHEEL WOULD NOT RESPOND. STEERING WHEEL HAD NO CONTROL. THE WEATHER WAS DRY, A FLAT ROAD. THE SPEED WAS ABOUT 65 PMH. VEHICLE CRAHED INTO A WALL. UPON IMPACT, AIR BAGS DID NOT DEPLOY. PASSENGER SUSTAINED A BROKEN BACK, AND ARM. DRIVER SUSTAINED A BROKEN ANKLE AND BRUISES. *AK