Sabena from Seaboard World Airlines, using them mainly on transatlantic routes. In the same period, there were experiments with helicopter passenger service using Sikorsky S-58 aircraft from Brussels to Antwerp, Rotterdam, Eindhoven and the Paris heliport at Issy-les-Moulineaux. 1960 saw the introduction of the Boeing 707-320 intercontinental jet for trans-Atlantic flights to New York. SABENA was mainland Europe's first airline to operate a jet across the Atlantic (BOAC had been flying jet transatlantic services using the de Havilland Comet 4 since 4 October 1958). One of Sabena's aircraft became the first Boeing 707 to crash while in commercial service when Flight
South African Airways route in 1967; Cocos Islands was dropped, while Sydney became the terminus. Flights to New York, via Rio de Janeiro, started on 23 February 1969 using a 707. The first 707 of SAA landed in Europe in October 1961 with a nine-hour flight to Athens. The jets arrived during a period when most African countries, except SA's neighbours, denied South African airlines the use of their airspace, necessitating long detours. In 1967 the Skymasters, Constellations and DC-7Bs were being retired, replaced by the Boeing 727 trijet the following year to complement the Boeing 707. The choice of 727 was based