THE EE WAS CHANGING AN OIL FILTER ON A PIECE OF EQUIPMENT AND WAS STANDING ON A THREE STEP LADDER. AS HE STEPPED DOWN TO THE BOTTOM STEP AND WAS LEAVINGTHE LADDER, THE FILTER SLIPPED FROM HSI HAND AND HIT THE FLOOR AT THE SAME TIME HE STEPPED DOWN. HE STEPPED ON THE FILTER, LOST HIS BALANCE AND FELL INTO THE HOIST CYLINDER AND STRUCK HIS FACE AND SAFETY GLASSES.