Complex sentence: Designed in 1975 to replace the UTVA Aero 3 as the primary basic trainer in the Yugoslav Air Force, The Utva 75 made its maiden flight in 1976.
Split into simpler sentences: Designed in 1975 to replace the UTVA Aero 3 as the primary basic trainer in the Yugoslav Air Force. It also The Utva 75 made its maiden flight in 1976.