Sita Air Flight 601 was a Nepalese domestic flight, due to be operated with a Dornier 228, that crashed on 28 September 2012, three minutes after it departed Tribhuvan International Airport, killing all 19 people on board.
The aircraft involved in the accident was a Dornier 228-202, registration 9N-AHA, serial number 8123; it was due to operate a domestic scheduled Kathmandu-Lukla flight. Shortly after departing Tribhuvan International Airport, the pilot reported technical issues with the aircraft, and requested to fly it back to the airport. Three minutes after take-off, on their way back to the airport, the aircraft crashed on the banks of the Manohara river and caught fire. All 19 people on board perished in the accident. The accident was the second deadly one to occur in Nepal in 2012, and the last of at least ten fatal crashes since 2002.
On 26 August 2013 the Nepal's Aircraft Accident Investigation Commission NAAIC releised their final report about the accident.You can read here