Russia has a significant problem with maintaining its aircraft due to the strict sanctions of the EU and the US. Many aircraft depend on Western parts; after years of imports, prior to sanctions imposed by major aerospace companies in the USA and the EU. To solve this, they use a network of third-party companies worldwide to purchase the parts and then resell them to Russia. This breaks sanctions laws, as manufacturers typically cannot sell aviation products that will be re-exported, meaning information is hidden in the chain.