The 309th Commodities Maintenance Group constructs, modifies, and overhauls component parts, subassemblies, and end items for the DoD supply chain. They are the Technical Repair Center for wheels, brakes, power systems such as gas turbine engines and auxiliary power units, hydraulics and pneudraulics, canopies, composites, textiles, fuel accessories/controls, low-observables, 20mm/30mm aircraft guns, pylons, tanks, and life support. The group is the DoD’s Center of Industrial and Technical Excellence for landing gear. Additionally, the group's Local Manufacturing performs structural sheet metal, aircraft canopies, flight controls and heavy machining work.