Abstract: Employee #1 and a coworker were replacing the bolts in the rail system of a overhead crane. They were working off a manual 25 ft long by 4 ft wide crane inspection platform that was attached to the bottom of the crane rails. Approximately 3 ft of the platform extended out on one side of the crane rail where a guardrail could not be attached. Employee #1 moved around the crane railing to the outside of the work platform to loosen a tight bolt. He was using his body weight to gain leverage to loosen the bolt when it broke loose and he lost his balance. Employee #1 fell backward approximately 40 ft, striking some machinery when he landed on the floor. He was killed. No form of personal fall arrest system was being used.