Cessna Celebrates 25th Anniversary Of The 525 Citation Model Textron Aviation company Cessna is celebrating the 25th anniversary of the very popular 525 Citation jet model. April 29th, 1991 was the maiden flight of the first 525 Citation jet model. Since then this model has undergone multiple upgrades to keep pace with changing trends and customer demands. According to Cessna, eight (8) platforms of the 525 Citation jet have been certified over the years. To-date over 1,800 525 Citation jets have been produced including the current production M2, CJ3+ and CJ4, making the CJ line the best-selling light jet series in the world.