First thought might be sanctions for the blame. Embraer is Brazilian and last year they announced they would no longer send parts to Russia. Brazil is the "B" in BRICs ... the Gang of Five - Brazil, Russia, India, China, and S Africa who plan on a new world economic order. Seems weird for one BRIC nation to turn on another while plotting against the world, so blaming Embraer could be interesting. Could be Wagner will get the blame for poor maintenance and general incompetence ... although he is usually known to inhabit the Kremlin.
Brazilian aircraft manufacturer Embraer stops parts supply to Russia