21 June, 2017 MC-21-300 aircraft performed the fifth flight within the program of in-plant development tests.
During the flight, lasted 2 hours and 10 minutes, the aircraft fully completed the flight task, which included testing the wing in all configurations. In particular, the landing was carried out in the landing configuration of high lift devices. The aircraft flew with retracted landing gear.
On 20 June, 2017 Oleg Demchenko, the president of Irkut Corporation at the Paris International Air Show said that МС-21-300 will perform more than 30 test flights within development test program after which certification tests will begin.
At the Irkutsk Aviation Plant, a branch of Irkut Corporation (part of UAC), the construction of the second MC-21-300 aircraft, intended for flight testing, was completed. The testing results of the first test aircraft were taken into account in the production of a new aircraft. On March 25, the MC-21-300 was transferred from the final assembly shop to the flight test department.
On November 2, 2017, the MC-21-300 test aircraft performed the first flight from the airfield of Flight Research Institute n.a. M.M. Gromov (Zhukovsky city, Moscow region). The flight lasted more than three hours. The characteristics of stability and controllability were assessed at the altitudes varying from 6,000 to 12,000 meters. All aircraft systems operated normally.