The Irkutsk Aviation Plant has completed assembly of a new MC-21-300 aircraft fuselage. While the fuselage is the fifth already and three prototypes are already in flight testing, what is special about this particular prototype is the fact that it would be the first one equipped with a new type of engines. This time, the engine would be made in Russia. However, a recent corporate espionage case could put a question mark at the end of the latter sentence.