EE WAS CARRYING AIR HOSES DOWN A SHORT FLIGHT OFSTAIRS (3-STEPS) FROM THE PREHEATER TOWER WHEN HE MISSED THE LAST STEP. HE FELL TO HIS LEFT ANDTWISTED HIS LT. KNEE. HE WAS DIAGNOSED WITH A TORN ACL AND MENISCAL TEAR AND WAS OPERATED ON MARCH 1, 2002, TO REPAIR THE DAMAGE.