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Very few aircraft are actually owned by airlines, and instead most are owned by lessor companies, most of which are Irish. Under the sanctions regime, the view in the legal community is that those leases have to be terminated, otherwise Irish companies will be criminally liable.

More importantly: Russian operators are unable to effect insurances. Without those, no national aviation authority will allow access to its airspace. This would in effect mean the end of Russian operators flying internationally.

Furthermore, despite the presence of some Sukhois, Ilyushins and Antonovs, the bulk of aircraft operated in Russia is still Boeing and Airbus. Those use CFM, GE and Rolls Royce engines.

All these manufactures have cut off access to repair manuals without which the aircraft and engines cannot be serviced. They have also issued a global ban on servicing in other countries, so that Russian aircraft cannot be flown abroad for maintenance.

They have also stopped the supply of spare parts. From talking to our clients, I understand most airlines keep about a 2 or 3 weeks worth of spares supplies.

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numbered
Furthermore, despite the presence of some Sukhois, Ilyushins and Antonovs, the bulk of aircraft operated in Russia is still Boeing and Airbus...

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hal
I saw that another industry analyst said that the whole passenger system could be wiped out if the Sabre reservation system cut russia off.