What was found
CREW REPORTED, AFTER LANDING THE BRAKES FAILED AFTER 50 KTS. EMERGENCY BRAKING SYSTEM WAS USED TO STOP THE AIRCRAFT. MAINTENANCE FOUND THE LEFT AND RIGHT BRAKE ASSEMBLIES TO BE WORN. THE LEFT AND RIGHT BRAKE ASSEMBLIES WERE REPLACED. MANUAL AND POWER BRAKE BLEEDING WAS PERFORMED FOR BOTH LEFT AND RIGHT BRAKE ASSEMBLIES. THE EMERGENCY BRAKE HYDRAULIC TANK AND NITROGEN BOTTLE WERE SERVICED. A SATISFACTORY OPERATIONAL TAXI TEST OF THE BRAKE AND ANTI-SKID SYSTEM WAS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.