<lol...look at all of the crashes of SU-30's and SU-27's how many engine failures have accured in 25+ years of oporation?>
How many? Do you absolutely know? When it comes to military accidents the military never comes clean (for any country).
Also those planes has 2 engines if one fails the pilot can still fly with another. There' re reasons why why the Russians never build plane with single engine. Their engine is just not reliable..