Abstract: At approximately 12:10 p.m. on November 4, 2009, Employee #1, a construction worker, and a coworker were deblinding and removing equipment from the decks on the 65-ft fractionation tower C-770 in the ISO MAX Unit. They decided to lower equipment from deck to deck using a rope. The coworker was on the top deck lowering a 65-lb Coppus manway fan (Equipment Number 596353, Model Number RF-2C, 6,000 rpm) when the knot came undone, allowing the fan to drop 21 feet to the next deck, striking Employee #1 on his right arm. He sustained a radial fracture to his right arm and was hospitalized for treatment.