as ▁Air ways ▁Corporation ▁( BO AC ) ▁began ▁supp lying ▁technical ▁support ▁after ▁acqu iring ▁a ▁ 6 . 5 ▁percent ▁share hold ing , ▁which ▁it ▁held ▁for ▁about ▁ 2 0 ▁years . ▁ ▁New ▁aircraft ▁including ▁V ick ers ▁Vis count s , ▁F ok ker ▁F 2 7 s ▁and ▁Douglas ▁DC - 3 s ▁were ▁added ▁to ▁the ▁fleet ▁in ▁the ▁late ▁ 1 9 5 0 s ▁and ▁early ▁ 1 9 6 0 s . ▁Turkish ▁Airlines ▁began ▁operating ▁their ▁first ▁jet , ▁a ▁Mc D onn ell ▁Douglas ▁DC - 9 , ▁in ▁ 1 9 6 7 . ▁This ▁was ▁followed ▁by ▁the ▁addition ▁of ▁three ▁Bo eing ▁ 7 0 7 ▁j ets ▁in ▁ 1 9 7 1 . ▁Other ▁aircraft ▁operated ▁in ▁the ▁early ▁ 1 9 7 0 s ▁included ▁the ▁Mc D onn ell ▁Douglas ▁DC - 1 0 ▁and ▁the ▁F ok ker ▁F 2 8 ▁which ▁were ▁put ▁into ▁service ▁in ▁ 1 9 7 2 ▁and ▁ 1 9 7 3 ▁respectively . ▁▁ 1 9 8 0 s ▁and ▁ 1 9 9 0 s ▁ ▁The ▁air line ▁was ▁pl ag ued ▁by ▁several ▁issues ▁in ▁the ▁ 1 9 8 0 s ▁and ▁ 9 0 s . ▁It ▁developed ▁a ▁reputation ▁for ▁poor ▁customer ▁service ▁and ▁del ays . ▁It ▁also ▁end ured ▁hij ack ings ▁and ▁suffered ▁seven ▁acc idents ▁between ▁ 1 9 7 4 ▁and ▁ 1 9