Aeroflot Flight B-2 crashes after takeoff from Vitim Airport in the Sakha Republic, killing 39.

Aeroflot Flight B-2 was a regularly scheduled passenger flight operated by Aeroflot from Vitim Airport in the Sakha Republic to Irkutsk International Airport near Irkutsk. On 20 July 1977, the Avia 14 operating this flight crashed into trees outside the airport shortly after takeoff. Thirty-three passengers and all six crewmembers were killed, while one passenger survived.

Vitim Airport is a public use airport built in Vitim, Sakha (Yakutia) Republic, Russia during World War II for the Alaska-Siberian (ALSIB) air route used to ferry American Lend-Lease aircraft to the Eastern Front.

Sakha, officially the Republic of Sakha (Yakutia), is a republic of Russia, and the largest federal subject of Russia by area. It is located in the Russian Far East, along the Arctic Ocean, with a population of one million. Sakha comprises half of the area of its governing Far Eastern Federal District, and is the world's largest country subdivision, covering over 3,083,523 square kilometers (1,190,555 sq mi). Yakutsk, which is the world's coldest major city, is its capital and largest city.

July 20 is the 201st day of the year in the Gregorian calendar; 164 days remain until the end of the year.