, ▁the ▁first ▁model ▁of ▁the ▁series , ▁designated ▁as ▁the ▁A TR ▁ 4 2 - 3 0 0 , ▁performed ▁the ▁type ' s ▁ma iden ▁flight . ▁During ▁the ▁mid - 1 9 8 0 s , ▁the ▁A TR ▁ 7 2 ▁was ▁developed ▁as ▁a ▁stretch ed ▁variant ▁of ▁the ▁A TR ▁ 4 2 . ▁On ▁ 2 7 ▁October ▁ 1 9 8 9 , ▁Finn ish ▁air line ▁Fin na ir ▁became ▁the ▁first ▁air line ▁to ▁operate ▁the ▁type ▁in ▁re venue ▁service . ▁The ▁A TR ▁ 7 2 ▁has ▁also ▁been ▁used ▁as ▁a ▁corpor ate ▁transport , ▁cargo ▁aircraft , ▁and ▁mar itime ▁pat rol ▁aircraft . ▁ ▁To ▁date , ▁all ▁of ▁the ▁A TR ▁series ▁have ▁been ▁completed ▁at ▁the ▁company ' s ▁final ▁assembly ▁line ▁in ▁Toul ouse , ▁France ; ▁A TR ▁benefits ▁from ▁sharing ▁resources ▁and ▁technology ▁with ▁Air bus ▁SE , ▁which ▁has ▁continued ▁to ▁hold ▁a ▁ 5 0 % ▁interest ▁in ▁the ▁company . ▁Success ive ▁models ▁of ▁the ▁A TR ▁ 7 2 ▁have ▁been ▁developed . ▁Typ ical ▁updates ▁have ▁included ▁new ▁av ion ics , ▁such ▁as ▁a ▁glass ▁co ck pit , ▁and ▁the ▁ad option ▁of ▁newer ▁engine ▁versions ▁to ▁deliver ▁en hanced ▁performance , ▁such ▁as ▁increased ▁efficiency ▁and ▁reli ability ▁and ▁redu ctions ▁in ▁operating ▁costs . ▁The ▁aircraft ▁share ▁a ▁high ▁degree ▁of ▁common ality ▁with ▁the ▁smaller ▁A TR ▁ 4 2 , ▁which