Hamilton Sundstrand, I suppose unsurprisingly given parent UTC's long-standing focus on Russia, is well-represented on the aircraft. It was almost a given that it would get the environmental control system, given its heat-exchanger joint venture with Nauka of Moscow, but it's also picked up: the APU. wing anti-icing; fire protection with UTC sister L'Hotellier; neutral gas system (which I assume means fuel-tank inerting); and electrical system.
But French interests - never far away in Russia - are also in evidence through various Zodiac Aerospace units. Zodiac's ECE of France is working with Hamilton Sundstrand on the electrical system; it's Intertechnique unit has got the fuel system; and Intertechnique is apparently co-operating with Hamilton Sundstrand again on the inerting; it's also won the oxygen system; and Zodiac's US C&D Interiors has got the main cabin contract.
Eaton, which has its own Russian ventures already, has won the hydraulics but Irkut says more than 50% of the components of the system will be produced by Russian firms PMZ Voshod, PKO Teploobmennik, MIZ Znamya, and Tehpribor.
But the biggest deals are only reduced to shortlists. UTC's Pratt & Whitney is in consideration for the engine along with Rolls-Royce; Rockwell Collins and Avionika of Russia are the final two for the avionics (although I wonder if they will somehow be forced together); and the flight control system appears to come down to a team led by Aviapribor of Russia supported by Goodrich AS of France and Moog of the USA - versus Liebherr I think.
Decisions on the engines, avionics and flight controls are due by 1 November. As far as I'm aware there is still intended to be a Russian engine choice as well.
During the MAKS show the Rosavia requirement for up to 65 new narrowbodies was announced, and somewhere there's a statement from Rosavia saying Boeing, Airbus and Irkut are in contention - but I can't see how Irkut can seriously pitch for that since deliveries are due to start next year. However, maybe some sort of plan to lease Western types and roll them over to MS-21s could be cooked up. After the weird and wonderful saga of the Aeroflot multiple Boeing and Airbus procurements I'd believe anything.