THE RIGHT REAR TIRE ON THE CONSUMER'S 1999 NAVIGATOR LOST IT'S TREAD CAP AND AS A RESULT THE DRIVER LOST CONTROL OF THE VEHICLE. THE RIGHT REAR TIRE WAS FLAT WITH NO OUTWARD SIGNS OF IMPACT OR SIDEWALL DAMAGE. *TS AS A RESULT OF THE TIRE(CONTINENTAL CONTITRAC A/T TIRE 205/75SR 17 RADIAL TIRE). *NM