Air Zaïre the government. Part of the contract with Sabena saw the Belgian airline train Air Congo personnel for a six-year period, and by the end of 1962 Air Congo had 2,400 employees, of which some 1,100 were seconded from Sabena. By this time the airlines' destinations included Entebbe, Lagos, Nairobi, Ndola, Salisbury and Usumbura. Jet service to Brussels was inaugurated in March 1963 utilising a Boeing 707 which was leased from Sabena, and in April 1963 the airline joined the International Air Transport Association, becoming the 94th overall member. The airline signed an agreement with French airline Union des Transports Aériens
Sabena that it had to buy jumbo jets for its prestige services, notably New York JFK and as of the mid-seventies, Chicago O'Hare. Sabena purchased only two first generation jumbo jets and it continued to fly the 707 into the late 1970s. In 1973, the Boeing 727s on the European network were replaced by Boeing 737-200s. The Douglas DC-10-30 entered service in 1974. In total, Sabena purchased five of these convertible (Passengers and/or freight) combi aircraft wide-body jets. In 1984 Airbus A310s were introduced on routes that had high passenger density. This aircraft type also introduced a modernisation of the 1973