So as it turns out the first western airliner delivered to a Russian airline was an A310 in 1992.
After that there must have been some import taxes because boeing once struck a deal to not pay these taxes. I have yet to find out approximately how much tax that would be.
The other way around, the USA imposed taxes on Sukhoi aircraft in September 2006.
I'm adding it to the to do list.
edit: the sukhoi sanctions don't matter as they were lifted before sukhoi made civil commercial airliners.
After that there must have been some import taxes because boeing once struck a deal to not pay these taxes. I have yet to find out approximately how much tax that would be.
The other way around, the USA imposed taxes on Sukhoi aircraft in September 2006.
I'm adding it to the to do list.
edit: the sukhoi sanctions don't matter as they were lifted before sukhoi made civil commercial airliners.