Su-35-4 catched fire while low-speed taxi tests at Dzemgi airfield, 16.55 local time (9.55 Moscow time) on Sunday, according to KNAAPO press-attache Vitaly Tyul'kin
originally maiden flight was scheduled for Friday, then postponed till Monday
flight attempt on Sunday took place because of unnamed hi-ranked comission arriving, according to some reports
earlier it was also reported that Su-35 tapped into heating duct at the end of runway
aircraft was destroyed by fire, pilot Eugeny Frolov has succesfully ejected
http://www.vz.ru/society/2009/4/27/280531.print.html
http://www.rian.ru/incidents/20090427/169305699.html
http://lenta.ru/news/2009/04/27/su/
PS Life of a pilot is the most precious thing. Per aspera ad astra.