 First flown on 10 January 1935, the Laté 521 achieved several world records relating to payload and endurance.It was introduced to passenger service by national operator Air France, who was able to launch several previously-unattainable long distance passenger routes.As a civilian aircraft, the Laté 521 was outfitted as a luxurious airliner, providing a high level of comfort for up to 72 passengers.