Tinker jet engine mechanic Bill Watson measures tolerances on an F100-229 high pressure turbine shaft in the Core Assembly Shop. The 848th Supply Chain Management Group, Oklahoma City Air Logistics Center Aerospace Sustainment Directorate and the 76th Propulsion Maintenance Group worked as a team to increase the number of ready engines from two to 41 in less than two years. (U.S. Air Force photo/Margo Wright)