Sabena taken delivery of two Douglas DC-3s. During the war the airline managed to maintain its Belgian Congo routes, but all European services ceased. After the war, in 1946 Sabena resumed operating a network of intra-European scheduled services. The fleet initially consisted mainly of Douglas DC-3s. There were thousands of surplus Douglas C-47 Skytrains (the military variant of the DC-3) available to help airlines restart operations after the war. The airline now flew under the name of SABENA - Belgian World Airlines. Sabena started its first transatlantic route to New York City on 4 June 1946, initially using unpressurised Douglas DC-4
Sabena Flight 503 communication was cut off. The aircraft had crashed somewhere in the mountains of Rieti, Italy North-East of Rome and was now missing. Sabena itself got notified about the missing aircraft that same night at 23:15 but would not make an official statement until the morning of the following day. The airplane had crashed somewhere in the mountains of Rieti, Italy North East of Rome which were known for being difficult to access and also lay in a nature reserve where wolves roamed. The Italians immediately started a search and rescue mission to locate the missing aircraft and rescue its occupants.