Abstract: At 1:00 p.m. on May 27, 2018, Employee #1, employed by an HVAC service company, was performing service on a health clinic's air conditioner. He set up a Werner Type 1A 24-foot extension ladder and attempted to access the air conditioner on the roof. Employee #1 lost his balance and fell, a fall height of 18 feet, striking his left arm and the right side of his head on a concrete walkway. He was transported to a regional health center and then to a university hospital, where he was treated for a dislocated left elbow that required surgery, fractures to the arm, and a laceration and contusion on his forehead.