"Aercap Holdings NV, the world’s biggest aircraft lessor, said it’s cooperating with a U.S. investigation into the supply of Airbus Group NV jetliners to Iran and that it previously sold some of the nine planes concerned. The aircraft were purchased by Tehran-based Mahan Air from Al-Naser Airlines of Iraq, which appears to have sourced two of them from Aercap, the lessor said in a filing, adding that it is assisting in the U.S. Office of Foreign Asset Control-led probe." (2015) (http://www.bloomberg.com/news/articles/2015-05-14/iran-s-airbus-purchase-to-herald-re-fleeting-rush-amid-u-s-thaw) (https://www.bloomberg.com/news/articles/2015-06-02/u-s-probes-aercap-over-sanctions-busting-sale-of-jets-to-iran)