Production of the MC-21 plane, which Russia hoped could revive its civil aviation industry, has been delayed for a year due to U.S. sanctions, the head of the Rostec conglomerate said Monday.
"Due to the fact that the Americans have stopped supplying composite materials, we are switching to our own," Sergey Chemezov told Russian news agencies in Abu Dhabi.
"The date of the beginning of mass production is slightly shifting" and is now expected by the end of 2020, he said.
Russia unveiled the prototype of the MC-21 in 2016, originally announcing plans for it to come into service in late 2018.
The plane, produced by the Irkut aircraft manufacturer, was designed to challenge industry giants Airbus and Boeing.
The MC-21 can carry up to 211 passengers and is designed for the mass-market travel industry. It can fly up to 6,000 kilometers (3,700 miles), according to the makers.
The makers have promised a "new level of comfort" for passengers thanks to the largest fuselage in the plane's class and large windows.
Irkut says it has signed contracts with a number of airlines, including Russian flagship carrier Aeroflot, UTair and the Kyrgyzstan Air Company.
The delayed launch would come nine years after Russia's short-haul Sukhoi Superjet aircraft came into service in 2011. It has since suffered serious technical issues that have forced the plane's grounding.
Washington first imposed sanctions on Russia in 2014 following Moscow's annexation of the Crimean peninsula from Ukraine.
The United States and European Union have since imposed several rounds of sanctions against Russia and Russian individuals.