[2] In 1946, Cruzeiro do Sul was granted the right by the Brazilian government to operate flights between Brazil, Puerto Rico, and the United States.

Upon visually checking the aircraft, the air traffic controller did not find any signs of fire in the engines and relayed this information to the Sirius crew.

After initiating a turn to align with the runway, the aircraft lost lift and crashed into a residence located at 2356 Avenida Piassanguaba, near the airport, catching fire afterward.

Despite the strong impact with the ground, twelve passengers (including the actor Renato Consorte) and one crew member survived the accident.

[8] Among the deceased was Congressman Miguel Bahury, who presided over a Parliamentary Inquiry Commission in the Chamber of Deputies, aimed at investigating the causes of the high number of air accidents in the country at that time.

[14] The creation of this commission was motivated by the crash of another Convair 340 during Real Transportes Aéreos Flight 435, in which Congressman Bahury's wife lost her life.

Later on May 3, the 23:00 Ponte Aérea flight suffered an incident with the explosion on the ground of an engine on another Cruzeiro Convair 340, causing many passengers to forgo flying at that time.

2 of the Sirius had shown problems during another flight to Porto Alegre, having been repaired, tested, and approved by Cruzeiro do Sul maintenance teams at that airport.

During the attempt to restart it, the crew forgot to turn off the extinguishers, which, when activated, automatically cut off the fuel supply and electrical command to the engine.