Forest Fire Equipment Operator (FFEO) Arnold was on-duty the morning of January 23, 2006. He spent the morning working on fire control bulldozers and preparing for an upcoming equipment inspection. Specifically, he removed the belly pans on a bulldozer. This work involved working on his back and maneuvering a 125-pound pan in the area beneath the bulldozer. Immediately after lunch, FFEO Arnold and another firefighter drove to pick up parts at a local automotive parts distributor. FFEO Arnold waited in the vehicle while the other firefighter went into the store. When the firefighter came back to the vehicle, he found FFEO Arnold slumped over the wheel of the truck. FFEO Arnold was unresponsive and the EMS system was activated. Paramedics arrived and transported FFEO Arnold to the hospital where he was later pronounced dead. The cause of death was listed as severe coronary artery disease.