Yes!! Our tow hooks are covered under STC SA220SO and are made under FAA PMA. For aircraft not covered by the STC, approval can be obtained for the complete tow hook and release system by following the guidelines in FAA Advisory Circular 43.13-2B, Chapter 8, titled, “Glider and Banner Tow-Hitch Installations” and using the STC’s ICA. Contact Pacific Aerial Tow Hooks for additional engineering.