Abstract: Employees #1 through #3 were trip testing a small steam turbine. They brought the turbine up to trip speed with the governor disabled to allow three tests without the turbine spinning down between tests. The tests were done using a reed-type tachometer that measures speed using vibrating reeds held in contact with the turbine. During the trip test, the turbine failed catastrophically and all three employees were struck by flying debris. Employee #1 suffered a fractured hip and was killed. Employee #2 sustained face injuries and Employee #3 fractured his leg; both were hospitalized. The turbine was a remanufactured unit made from three separate turbines that were originally built in the 1940s. Complete documentation on the remanufactured unit and the three original units was not available. There were no specific testing procedures for this turbine.