br The new prototype of the Russian aircraft completed the route without issues and now enters the critical testing phase.br Photo: UACbr br The new MC-21 prototype completed a 6-hour nonstop flight between Irkutsk and Zhukovsky, marking another important milestone in the aircraft’s certification program. According to the PJSC Yakovlev test team, the medium-range jet maintained stable performance, with all systems operating normally. The model now moves into the critical evaluation phase at the UAC testing complex.