There is no suggestion of wrongdoing by western companies, nor that they were aware that their products were being moved on to Russia by the Indian firms.
The direct sale of aircraft parts to Russian airlines and firms has been banned by the UK and the EU and is heavily restricted by US authorities.
Western allies have struggled, however, to deal with the scores of intermediary firms that have moved in to prop up Russia with western-made goods and technology.
The UK government highlighted its concerns in January when issuing
new guidance for exporting businesses on “countering Russian sanctions evasion”. Firms were told to “undertake due diligence to ensure that the end destination of these products is not Russia”.