In preparation for the maiden flight of the new MC-21 airliner, Irkut Corporation began tests of MC-21-300-0001 aircraft on frequency response.

Other progress on the aircraft in preparation for flight tests includes:

- fuselage has been tested for airtightness

- on-board measurement systems and equipment have been installed

- aircraft systems are undergoing adjustment procedures

- the aircraft is switched to electric power

The works are held in the final assembly shop of the Irkutsk Aviation plant with the participation of specialists from the Central Aerohydrodynamic Institute named after N.E. Zhukovsky (TsAGI).