▁and ▁A TR ▁ 7 2 – 6 0 0 ▁featured ▁various ▁improvements ▁to ▁increase ▁efficiency , ▁dispatch ▁reli ability , ▁lower ▁fuel ▁burn ▁and ▁operating ▁costs . ▁While ▁broad ly ▁similar ▁to ▁the ▁earlier ▁- 5 0 0 ▁model ; ▁differences ▁include ▁the ▁ad option ▁of ▁improved ▁P W 1 2 7 M ▁engines , ▁a ▁new ▁glass ▁co ck pit , ▁and ▁a ▁variety ▁of ▁other ▁minor ▁improvements . ▁ ▁As ▁a ▁consequence ▁of ▁strong ▁demand ▁for ▁the ▁- 6 0 0 ▁series , ▁A TR ▁decided ▁to ▁invest ▁in ▁the ▁establishment ▁of ▁a ▁second , ▁more ▁modern ▁final ▁assembly ▁line ▁and ▁ac quisition ▁of ▁more ▁hang ar ▁space ▁at ▁its ▁Toul ouse ▁site , ▁along ▁with ▁a ▁new ▁large ▁completion ▁and ▁delivery ▁area ; ▁overall , ▁the ▁manufact uring ▁operation ▁expanded ▁to ▁four ▁times ▁the ▁foot print ▁that ▁it ▁had ▁in ▁ 2 0 0 5 . ▁Spe aking ▁in ▁October ▁ 2 0 1 5 , ▁A TR ▁CE O ▁Patrick ▁de ▁Cast el b aj ac ▁stated ▁that ▁the ▁firm ▁was ▁set ▁to ▁produce ▁in ▁excess ▁of ▁ 9 0 ▁aircraft ▁that ▁year , ▁and ▁that ▁the ▁new ▁manufact uring ▁facilities ▁could ▁support ▁a ▁production ▁rate ▁of ▁up ▁to ▁ 1 2 0 ▁per ▁year . ▁At ▁the ▁time , ▁the ▁company ▁had ▁a ▁back log ▁of ▁orders ▁for ▁ 3 0 0 ▁aircraft , ▁sufficient ▁for ▁three ▁years ▁of ▁production . ▁During ▁ 2 0 1 7 , ▁a ▁new ▁in - house ▁finan cing ▁and ▁le