Abstract: At approximately 7:30 p.m. on May 29, 1990, Employees #1 and #2 placed a #19289 4-leaf truck spring in the south bulldozer machine and closed the top guard but did not close the side guards. The machine was activated and, as the compression operation was taking place, the fourth leaf, which weighed 37.1 lb, broke into two pieces. One piece flew out of the south side, striking Employee #1 in the left thigh area and causing him to fall. The second piece flew out of the north side and struck Employee #2 in the lower legs. Employee #1 sustained bruises, and was treated and released from the hospital. He went back to work the next night. Employee #2 sustained cuts on his right lower leg, which required stitches, and bruises on the lower parts of both his legs. He was treated and released from the hospital.