The supply of aircraft parts to Russia will be stopped.

The US and EU imposed sanctions on Russian airlines and Boeing and Airbus stopped providing support services.

Boeing said on Tuesday that it was suspending parts, maintenance and technical support to Russia.

As the conflict continues, our teams are focused on ensuring the safety of our teammates in the region.

On the very next day, Airbus said it would stop supporting Aeroflot, the Russian flag carrier, which operates flights on the A320, the A330, and the A350.

The European manufacturing company said in a statement that it had suspended support services to Russian airlines as well as the supply of spare parts to the country.

Consultants IBA say that Russia accounted for a sixth of airline capacity in 2011.

About two thirds of Russia's fleet is made up of Boeing and Airbus jets, according to data from Cirium Fleets.

Planes owned by Russian airlines will be flown domestically while they have enough parts in stock, but carriers may have trouble getting jets serviced abroad.

Even where parts can be found outside the country, airlines face payment difficulties after some Russian banks were barred from the international payments system.

In addition to the suspension of support services, Western leasing firms will attempt to repossess jets operated by Russian carriers, with 515 planes leased from foreign companies.

Analysts think leased jets will be able tonibalise others to keep others flying, which may make it difficult for them to get their hands on these planes.

Because parts are limited, we will expect to see aircraft that are on the ground in Russia being robbed in order to keep the rest of the fleet operational.