paris president donald trump hawkish new approach towards tehran couple bank worry domestic political turbulence countries cause grow uncertainty iran 36 billion deal buy airliners boeing airbus atr iranair decision buy total 200 aircraft two giants franco-italian turboprop maker atr mark zenith 2015 pact tehran world power renew trade exchange place curb iran nuclear activity iranair say 16.5 billion deal boeing big u.s. company since 1979 islamic revolution high stake make deal prominent target critics detente washington tehran experts say could frighten european bank others whose reluctance provide finance already major obstacle trump strike blow nuclear agreement iran friday choose certify tehran comply deal warn might ultimately terminate iran strategy anger tehran put washington odds signatories accord britain france germany russia china european union benefit economically renew trade iran trump pull unite state agreement give u.s. congress 60 days decide whether reimpose economic sanction tehran lift pact even without sanction fate aircraft deal depend u.s. administration approval several people involve airliner deal fear become big cancel sensitive implement fully beyond limit number jet iran fund pay cash without foreign loan see would will provide finance iran negative groundswell unite state say consultant former aviation banker bertrand grabowski raise immediate concern boeing prepare start build 15 long-range twin-engined 777-300er jet originally due delivery iran next april fate aircraft part total order 80 jet see affect job boeing try put floor decline production one profitable model 777s seem increasingly difficult western banker say unexpected hurdle arise iranian side financial source say boeing already push iran back queue jet yet receive deposit boeing manage juggle deliveries airlines complete breakdown iranair order could put new pressure 777 production u.s. export ones stake although european union back nuclear deal export western aircraft iran depend permit u.s. administration number u.s. part mean airbus could get catch crossfire boeing congressional critics want whole deal ax something likely deepen tensions iran europe iran far import nine aircraft three airbus six turboprop maker atr lose rest iran business would hit airbus order book hard take risk book 100 iranian plane sales last december help beat boeing annual order race boeing yet formally post order airbus boeing deal interconnect approvals pass washington eye trump administration treat high-profile plane deal kick broad nuclear issue congress iran foreign minister mohammad javad zarif say saturday negative move would consider violation 2015 nuclear pact tehran world power industry source say washington far issue license aircraft sales iran end decade must renew base estimate delivery plan effectively open door 15 boeing 777s 30-40 airbus jet say airbus boeing decline comment delivery schedule one source say possible outcome status quo would remain place regard license already issue political legal consequences revoke would become hard extend obtain new ones fate second part iranair deal could push beyond next u.s. election 2020 even nuclear pact survive scrutiny congress airlines like aseman airlines order 30 boeing jet may want buy turboprops face uncertain wait u.s. approval boeing spokesman say boeing iranair continue work implement contract airbus decline comment tehran aircraft deal remain center-stage iranian hard-liners seek exploit late dispute washington weaken domestic rival open west iran important deal remain intact ... failure plane deal major blow us say senior iranian official collapse domino effect deal potential foreign investors iran aircraft deal hang thread trump target tehran