Moscow, Russia - Irkut Corporation has completed the system tests of the fourth MC-21-300 prototype intended for flight tests.
The testing results of the previous prototypes were taken into consideration during the production process of the fourth prototype.
There are currently three prototypes used for testing purposes, one for flight tests and two for static tests.
On November 28, the fourth prototype was transferred from the final assembly line to the manufacturer's flight-test department.
The MC-21-300 has so far carried out three test flights since the involvement of EASA (European Aviation Safety Agency) experts in the certification process last month.
Before live flights, EASA experts were made familiar with the aircraft in the flight simulator by their Russian colleagues. Subsequently, a combined EASA and Yakovlev Design Bureau (a branch of Irkut Corporation) crew team performed a series of test flights with the МС-21-300.
A combination of experts from the Russian Federal Transport Agency (Rosaviatsiya) and EASA are all taking part in the aircraft's certification process.
Irkut Corporation aims to obtain airworthiness certification from Rosaviatsiya next year and from EASA in 2021.
United Aircraft Corporation (UAC), the parent company of the Irkut Corporation, plans to deliver six MC-21 in 2021 and double it in 2022. The company aims to roll out 25 aircraft in 2023 and then 72 aircraft per year by 2025.
The backlog of MC-21 remains unchanged since 2017 and currently stands at only 175 copies intended mainly for Russian airline operators.