EE WAS DOING PRESHIFT INSPECTION OF HIS HAUL TRUCK, WHEN HE NOTICED THE DRIVER SIDE BOARDING LADDER BENT BACKWARDS. EE WAS ATTEMPTING TO STRAIGHTEN IT OUT WHEN HE FELT A PAIN IN HIS KNEE. EE WAS TREATED FOR A MILD KNEE STRAIN AND RELEASED BACK TO WORK. ON 5-24-01, EE STARTED LOSING TIME AS A RESULT OF THE INJURY.