I would call this the first "fully-functional" or "multi-mission" aircraft. Vega was a balloon with no controls. Curiosity descent stage was a spacecraft that p

I would call this the first "fully-functional" or "multi-mission" aircraft. Vega was a balloon with no controls. Curiosity descent stage was a spacecraft that performed landing maneuvers. Both of these crashed into the surface as part of their mission goals. They barely could qualify as aircraft, and only in the sense that they floated in air briefly before crashing. Neither could be used for multiple missions or actually take off and land under their own power.