Abstract: At 2:21 p.m. on May 5, 2017, Employee #1, employed by a concrete pumping equipment rental company, was working at the construction site of a multifamily residential project. Employee #1, operating a 1999 Putzmierter concrete pump truck, had delivered concrete to the site. He then began to perform a washout on the concrete pump truck, a regular procedure operators perform after every delivery. This procedure requires that the motor be running in order to operate the pump system. Employee #1 had the truck's engine on and idling. As EE1 was rinsing the equipment, he pulled on the water hose. The hose pressed on the control levers on the side of the equipment, causing the auger to engage and start rotating. A cutout switch that would have shut off power was missing parts, including its guard, and did not work properly. Employee #1's right foot was caught in the rotating paddles of the auger. Emergency services were called, and Employee #1 was transported to the hospital. He was admitted and treated for a fractured ankle that required surgery.