WRIGHT-PATTERSON AFB, Ohio, Nov. 25 -- The U.S. Air Force Life Cycle Management Center issued the following news: The first Air Force C-21A aircraft left the Avcon Industries facility in Newton, Kan., Nov. 10, after receiving an aft fuselage Delta Fin modification. The modification comes after a number of aircraft in the C-21A fleet incurred flight restrictions due to issues with wing rock/dutch roll or "tail wagging", on approach to landing. Delta Fins, located on the aft fuselage just under  more