noun
maiden flight
Refers to the first flight of an aircraft, spacecraft, or pilot. Often used in aviation and space contexts.
新型旅客機が処女飛行に成功した。
The new airliner successfully completed its maiden flight.
Compound of 処女 (shojo, 'virgin') and 飛行 (hikō, 'flight'), literally 'virgin flight'. The term is a calque from English 'maiden flight'.