In 1971, Armin Baltensweiler took over as the president of the directorial board and ran the enterprise for over two decades. In the same year, the first Boeing 747-200 jumbo jet was acquired, and in the next year, the first McDonnell Douglas DC-10-30 followed. Both types shaped the long-haul fleet until the 1990s. Again, the specifications of both aircraft were developed in collaboration with SAS. Also in 1972, Switzerland introduced a prohibition of night flights, which led to the cessation of cheaper night fares.