EMPLOYEE WAS OPERATING A GETMAN TRACTOR, HELPED LOAD MATERIAL ON MAN CAGE, WHEN CAGE RETURNED TO BOTTOM HE WALKED TOWARDS HIS TRACTOR AND TRIPPED ON A WIRE ROPE SLING AND FELL ON HIS HANDS A ND KNEES. ACCIDENT OCCURRED 1-24-03 BUT WAS NOT DIAGNOSED UNTIL 2-20-03 WITH A TORN MENISCUS RIGHT KNEE.