Claim: UTVA Aero 3, which was a replacement to the piston-engined military trainer aircraft Ikarus Aero 2, is a Yugoslavian military trainer which was introduced in 1958 but was first flown in August 1956.
Evidence: The UTVA Aero 3 was a piston-engined military trainer aircraft built in Yugoslavia to replace the Ikarus Aero 2 then in service. The Ikarus Aero 2 was a piston-engined military trainer aircraft built in Yugoslavia in the years following World War II, although the design pre-dated the war. 1958 August 1956 Military trainer