Sukhoi is to speed final assembly of Superjet 100s under a co-operation arrangement with Russian airframer Aviastar, based in Ulyanovsk.
The agreement covers interior fitting and the first production Superjet to be covered, serial number 95017, is due into the Aviastar facility today.
This twinjet will be delivered to Russian flag-carrier Aeroflot.
Following cabin installation at Aviastar the aircraft will be transferred to Ulyanovsk's painting facility operated by Spektr-Avia, which handles types including the Ilyushin Il-96, Antonov An-124 and Tupolev Tu-204.
Spektr-Avia has dealt with Superjet painting since July last year, beginning with serial number 95010.
Aviastar has set up a dedicated area within one of its hangars enabling it to handle four Superjets at the same time.
"The Aviastar interior mount facility will become an important part of the Superjet 100 programme production chain," says Sukhoi civil aircraft division chief Vladimir Prisyazhnyuk.
He says the co-operation arrangement will "help to ramp up" production of the 98-seat type.
Aviastar chief Sergei Dementiev adds: "It is important for us to diversify the product and service range of Aviastar through participating in co-operation related to the modern United Aircraft products."