Drew, James: USAF to continue A-10 ‘Warthog’ wing productionFlightGlobal. 4.2.2016. Washington DC: Reed Business. Viitattu 8.4.2018. (englanniksi) Lainaus: "The same day, the air force released a draft statement of work regarding construction of slightly updated versions of the A-10 enhanced wing assembly currently built by Boeing and Korean Aerospace Industries. Boeing’s contract includes 173 wings with options for 69 more, but the air force confirms that ordering period ends in September. Boeing has said those wings, based on 3D models of the original thick-skin wing design of the 1970s, could keep the aircraft flying past 2040."
