Sabena followed on 1 May 1929 via Antwerp, Düsseldorf, and Essen. When Sabena was created, the airline was partly funded by Belgians in the Belgian Congo colony who lost their air service, an experimental passenger and cargo company (LARA) between Léopoldville, Lisala, and Stanleyville a year earlier and who expected the new Belgian national airline to fill this gap. On 12 February 1925, Sabena pioneered a long haul across Africa to Leopoldville, capital of the Belgian Congo. Throughout its history, Sabena had a long tradition of service to African destinations and for a long time these were the only profitable routes
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.