The term 'FIRST FLIGHT' can be solved by the word 'SOLO', which is a four letter word. The term 'FIRST FLIGHT' refers to the first successful powered flight of an airplane, which was achieved by the Wright Brothers on December 17th, 1903. The Wright Brothers flew their plane, the Wright Flyer, for a total of 12 seconds and a distance of 120 feet. This historic event marked the beginning of the aviation industry.