TR ▁ 4 2 ▁and ▁A TR ▁ 7 2 ▁aircraft ▁had ▁already ▁been ▁converted ▁to ▁fre igh ters . ▁ ▁Iran ▁Air ▁ ▁During ▁February ▁ 2 0 1 6 , ▁A TR ▁signed ▁a ▁deal ▁with ▁flag ▁car rier ▁Iran ▁Air ▁for ▁a ▁batch ▁of ▁ 2 0 ▁A TR ▁ 7 2 - 6 0 0 s , ▁along ▁with ▁options ▁for ▁ 2 0 ▁more ▁aircraft ▁and ▁post - p urchase ▁services , ▁such ▁as ▁engine ▁maintenance . ▁Made ▁possible ▁by ▁a ▁negoti ated ▁relax ation ▁of ▁international ▁san ctions ▁against ▁Iran , ▁during ▁June ▁ 2 0 1 7 , ▁a ▁€ 1 ▁billion ▁Iran ian ▁contract ▁was ▁final ised ▁for ▁the ▁ 2 0 ▁air lin ers ; ▁the ▁delivery ▁of ▁the ▁first ▁four ▁aircraft ▁occurred ▁within ▁weeks ▁of ▁the ▁deal ▁being ▁completed . ▁US ▁san ctions ▁against ▁Iran ▁were ▁re im posed ▁in ▁August ▁ 2 0 1 8 , ▁by ▁which ▁time ▁ 1 3 ▁of ▁the ▁order ▁of ▁ 2 0 ▁aircraft ▁had ▁been ▁delivered . ▁In ▁April ▁ 2 0 1 9 ▁the ▁US ▁Office ▁of ▁Foreign ▁As sets ▁Control ▁( OF AC ) ▁issued ▁a ▁two - year ▁lic ence ▁to ▁A TR ▁to ▁allow ▁it ▁to ▁supply ▁spare ▁parts ▁and ▁other ▁ess entials ▁to ▁keep ▁the ▁fleet ▁of ▁ 1 3 ▁A TR ▁ 7 2 - 6 0 0 s ▁in ▁operation . ▁However , ▁the ▁remaining ▁ 7 ▁A TR ▁ 7 2 - 6 0 0 s ▁from