Russian state corporation Rostekhnologii's leasing arm Aviakapital-Servis has firmed an order for 35 Irkut MS-21 twinjets.
The deal, signed in Moscow, is valued at a list price of $2.32 billion.
Irkut is expected to deliver the 35 aircraft - made up of 18 -200 and 17 -300 variants - between 2022 and 2025.
The aircraft will all be powered by Aviadvigatel PD-14 engines.
The MS-21 is scheduled to make its first flight in 2014, with certification and first deliveries by 2017.
In August 2011, Rostekhnologii and Irkut entered into a contract for 50 MS-21s and options for 35 more. These aircraft are due to be delivered between 2017 and 2022.