“As of March 2022, Russia had about 820 foreign-made civilian aircraft..uncertified repairs with non-original parts…nearing 70% of the fleet…

Per current data, over 35% of Russia’s aircraft have been scavenged for parts.”

https://euromaidanpress.com/2023/11/23/russian-civil-aviation-nearing-collapse-due-to-sanctions-ukraine-intelligence-says/