MAN WORKING AT BOTTOM OF #2 MOTOR PIT, STANDING ON INSULATING PLATE. MAN WAS PULLING UP ON 1 1/2"" DIAMETER CABLE. THE COMBINATION OF THE MAN'S WEIGHT AND THE FORCE OF PULLING CAUSED PLATE TO B REAK. MAN BROKE THROUGH PLATE, FELL STRAIGHT DOWN AND SCRAPED SHIN ON INSULATING PLATE.