THE RETRACTABLE POWER RUNNING BOARDS ON MY 2003 LINCOLN NAVIGATOR INTERMITTENTLY FAIL TO DEPLOY AND/OR RETRACT. AS A RESULT OF THE FAILURE TO DEPLOY, I FELL WHILE EXITING THE VEHICLE, HITTING MY HEAD ON THE GROUND, INJURING MY LOWER BACK (LUMBAR)IN TWO PLACES AND FRACTURING MY (THORACIC) SPINE AT T-12. I'VE RESEARCHED THIS ON LINE AND FOUND SEVERAL OTHERS VEHICLE OWNERS WHO HAVE THE SAME PROBLEM WITH THE RUNNING BOARDS. I'M TOLD THAT FORD HAS A SERVICE BULLETIN #17249 THAT DESCRIBES THE MALFUNCTION. FORD AND THE DEALER HAVE BEEN UNABLE OR UNWILLING TO REPAIR MY VEHICLE. I HAVE LEFT IT WITH THE DEALER FOR REPAIRS NUMEROUS TIMES, TWICE ONE OF THE RUNNING BOARDS WAS STUCK IN THE OUTER POSITION AT THE TIME IT WAS LEFT FOR REPAIR. I HAVE MET WITH THE FACTORY ENGINEER ON TWO OCCASIONS. I HAVE MADE NUMEROUS COMPLAINTS AND TELPHONE CALLS TO THE LINCOLN CUSTOMER SERVICEHOTLINE AND MET WITH SMITHTOWN LINCOLN MERCURY'S PREVIOUS AND CURRENT SERVICE MANAGERS. A DANGEROUS CONDITION EXISTS. HOPEFULLY YOU WILL TAKE AN INTEREST AND FORCE THEM TO TAKE WHATEVER ACTION IS REQUIRED TO CORRECT THE MALFUNCTION BEFORE OTHERS ALSO SUSTAIN SERIOUS INJURIES. *SC