 SILA had become the Swedish part of SAS in 1946, which at that time only a co-operation between DDL in Denmark and DNL in Norway.However, on October 1, 1950, representatives from the three airlines signed a consortium agreement where they appointed SAS to run the airline operations and the three national airlines only to be holding companies.ABA was the first airline with three-engine passenger aircraft when in 1925, ABA bought three Swedish Junkers G.24 from AB Flygindustri.