The four-seater Cessna 172 is the most successful civilian airliner in history, with more than 45,000 built, primarily used as a training aircraft, followed by the Boeing 737, which affected the problems announced. With the fourth generation of the 737 Max planes that suffered two fatal accidents in 2018 and 2019, with Boeing’s reputation and profits, the Boeing 727 took fifth place if Boeing’s original plan for the medium-sized plane was to manufacture only 250 aircraft, but it became the first commercial aircraft to reach 1,000 sales .

Source: CNN