30 June 2013
UTair Flight UT-471 , Boeing 737-500 from Surgut to Belgorod with 114 passengers after took off from Surgut Airport and while was climbing the main air condition system malfuctioned with result the depressurization of cabin.The crew declared an emergency and after burn some fuel diverted back to Surgut for a safe landing
Surgut Airport
Source
http://www.gudok.ru/news/transport/air/?ID=918108