I am sure Russians will just play by the book, it also helps that India is a neutral country towards them, those days it almost mean an ally in their eyes.
Also bringing Air India engineers to inspect/repair is not an issue.
There is a potential twist if the engine needs to be replaced in Magadan. 1) US sanctions on technology and parts export; 2) to bring a complete GE90 assy you need an An-124 and then VDA is banned outside Russia and ADB will not fly to Russia. That will be quite a logistics with paperwork change in transit…