Abstract: On November 3, 2008, Employee #1, a machine operator, was operating a CNC horizontal and vertical mill machines and lathes, machining commercial metal parts of different sizes and shapes. Employee #1's set up a CNC horizontal mill machine manufactured by Mori Seiki, (Model Number 63-173, Serial Number 173). Employee #1's coworker told him to mill parts that were approximately 18-in by 24-in by 6-in. After producing a few metal parts, Employee #1 climbed into the mill machine to clean metal shavings that accumulated at the bottom. Employee #1 did not deenergize or use lock out or block out procedures. Employee #1 was subsequently trapped, and the cutting piece of the mill amputated his right leg. Employee #1 was hospitalized and treated for his injuries.