MY FORD EXPEDITION IS EQUIPPED WITH A 5.4L TRITON ENGINE AND LIKE MANY OTHER ENGINES OF THE SAME FAMILY, IT BLEW A SPARK PLUG OUT OF THE HEAD WHILE DRIVING DOWN THE INTERSTATE. THIS ALLOWED FUEL TO ESCAPE AND ALMOST CREATED A FIRE UNDER THE HOOD. LUCKILY, I WAS ABLE TO CONTAIN IT WITHOUT ANY DAMAGE. HOWEVER, I AM MECHANICALLY SAVVY, SO OTHERS MAY NOT KNOW WHAT TO DO IN SUCH AN EVENT. HOWEVER, THE REASON IS BECAUSE THE SPARK PLUG CAME OUT OF THE ENGINE WITHOUT ASSISTANCE AND BEING THAT I HAVE NEVER INSTALLED SPARK PLUGS IN IT, THE FAILURE WAS NOT DUE TO MY NEGLIGENCE. BEING THAT THIS HAS HAPPENED TO MANY OTHER PEOPLE AND THE NATURE OF IT BEING POTENTIALLY FATAL, I DO NOT UNDERSTAND WHY THIS HAS NOT BEEN ADDRESSED AND CONSIDERED FOR A RECALL TO REMEDY THIS ISSUE.