The Irkutsk Aviation Plant, a branch of Irkut Corp. (a part of United Aircraft Corp., Moscow, Russia), has completed systems diagnostics of the fourth MS-21-300 aircraft designed for flight tests.

The results of first prototypes testing were taken into account in the aircraft production process. Three of these aircraft are now undergoing flight tests, while two of the four continue undergoing static tests, in pursuit of certification from the European Union Aviation Safety Agency (EASA, Cologne, Germany) for flight and entry into service.

On Nov. 28, the newest aircraft was transferred from the final assembly shop to the plant's flight-test division.

The MS-21 features the world’s largest infused, out-of-autoclave carbon fiber composite wings, which are manufactured by AeroComposit (Moscow, Russia).(來(lái)源： Irkut Corp.)