 The DC-3s remained in service much longer, and in 1971 the last four of them were sold to the Fuerza Aérea Uruguaya.São Paulo was added to the route network in January 1954.On the carrier entered the turbine era with the delivery of its first of three Vickers Viscounts four-engined turboprops purchased new from Vickers; it later acquired two Viscount 700s from Alitalia and three Viscount 800s from VASP.