Mi-17 vs Western Aircrafts
I think I understand why some people complain about Mi-17 parts quality.
My company supply Mi-17 parts for Iraq Air Forces for the last 4 years already. And we receive a lot of complains on the parts produced (or overhauled) in Ukraine. I've heard about ukrainian vendors supplying fake passports and fake parts. If you don't deal with Ukrainian vendors and deal directly with manufacture plants (like Kazan Helicopters and Ulan-Ude), you will not have any complains from the customers. That's the lesson we had to learn.