Mahan Air has purchased U.S.-origin aircraft parts using Turkish front companies, according to a recent filing by the U.S. Department of Commerce's Bureau of Industry and Security (BIS). Between September 2016 and December 2017, Turkish national Gulnihal Yegane helped Mahan Air circumvent U.S. sanctions and export controls by creating shell companies in Turkey to facilitate the purchases. Yegane used these companies, including Trigron Lojistik Kargo, RA Havacilik, and others, to purchase Boeing aircraft engines and gaskets for Mahan's Boeing aircraft. Mahan is an Iranian airline sanctioned by the United States for supporting the Islamic Revolutionary Guard Corps and for transporting weapons and fighters throughout the Middle East. The BIS filing ordered a ban on U.S. exports to Yegane and any affiliates.