Abstract: On July 20, 1987, Employee #1 and two coworkers were working on opposite ends of a boom. Employee #1 removed two coupling pins on the boom and placed them in the back of a nearby service truck. He then returned to the same section of the boom and tried using a pipe wrench to remove a section of 2 inch air line that was attached to the boom. Apparently, the boom was being temporarily held in place by the air line; a few minutes later, while Employee #1 was prying on the air line, the boom collapsed, crushing him. The two coworkers began CPR and called for help. Approximately 15 minutes later, an ambulance arrived and transported the employee to the hospital. He was pronounced dead on arrival.