Aeroflot Flight 821 was a scheduled domestic passenger flight operated by Aeroflot-Nord in a service agreement with Aeroflot and as its subsidiary. On 14 September 2008, the Boeing 737-505 operating the flight crashed on approach to Perm International Airport at 5:10 local time (UTC+06). All 82 passengers and six crew members were killed. Among the passengers who were killed was Russian Colonel General Gennady Troshev, an adviser to the President of Russia who had been the commander of the North Caucasus Military District during the Second Chechen War. A section of the Trans-Siberian Railway was damaged by the crash. Flight 821 is the deadliest accident involving a Boeing 737-500, surpassing the 1993 crash of Asiana Airlines Flight 733, and was the second-deadliest aviation accident of 2008, behind Spanair Flight 5022.