Irkut’s fourth flight-test MC-21-300 has emerged from painting in Ulyanovsk and returned to join the rest of the certification fleet in Moscow.

The aircraft, numbered 73056 and fitted with Pratt & Whitney PW1400G engines, was transferred to Moscow’s Ramenskoye airfield on 25 June.

MC-21 painting

Source: Irkut

Aircraft 73056 bears the flight-test fleet number ‘004’

It features a cabin with a layout equating to a 211-seat all-economy configuration, with wider seats and narrower aisles, although only 172 are installed to make room for test workstations.

“This maximum-density configuration has been chosen to carry out certification tests of the passenger cabin, including emergency exit tests,” says the airframer.

MC-21 interior

Source: Irkut

Irkut will test the aircraft with an all-economy layout of 211 seats

Irkut says the workstations and other equipment will be removed, and a full seat layout fitted, before these tests are conducted.

It states that the high-density layout is intended to appeal to the low-cost airline market. Irkut says it has overall orders for 175 MC-21s.