EE WAS WALKING UP STAIRS WITH HIS TOOL BAG THAT WEIGHED ABOUT 45 PDS. WHEN HE STEPPED UPSTAIRS, PUSHING WITH HIS LEFT LEG HE FELT PAIN IN HIS KNEE. HE WORKED THE REST OF HIS SHIFT, BUT THE NEX T DAY, HE REQUESTED MED TREATMENT & WAS TAKEN TOTHE ER FOR EVALUATION & TREATMENT. HE HAD A F0LLOW UP WITH AN ORTHOPEDIST & WAS DIAGNOSED WITH AMENISCUS TEAR & WAS PLACED ON RESTRICTED DUTY