The route network was expanded along the coast during the early 1950s. In 1951, Casablanca, Ghudamis and Tripoli were incorporated as destinations. In that year, a Tunis–Tripoli–Sabhah service was launched; it was routed via Sfax and Djerba in . The Ghudamis route was terminated in 1952, and the Casablanca run was taken over by Air France the same year. In 1953, the service to Marseilles was extended to Paris. In 1954, a Douglas DC-4 was leased from Air France and used on the route to Paris. At , the fleet comprised three Douglas DC-3s, one Douglas DC-4 and a SNCASE Languedoc. During 1955, the carrier transported 92,344 passengers. At year end, the number of employees was 140. The airline had a revenue of £620,000 for 1955, and costs totalled to £550,000. In 1957 the Tunisian government became the largest shareholder (51%) and the stake held by Air France was reduced to 15%.