TB-7 were under construction on an aircraft manufacturing plant in Kazan. In July 1941 from such airplanes have generated the first fighting connection under a command of known polar pilot Mikhail Vodopyanov, and in August, 1941 this connection has made a strike to Berlin. At fulfilment of this long-distance flight TB-7 had three tons of bombs, i.e. in some times it is more, than twin-engined distant bombers.
   Because of the come to light unreliability of diesel engines on ÒÁ-7 began to set AM - 35À, crew of pilot Pusepa on such airplane in 1942 has delivered in the USA, and then back to Moscow the Soviet diplomatic mission led by Vyatcheslav Molotov.
   After Vladimir Petlyakova death in 1942 airplane TB-7 have renamed in Pe-8. På-8 with AM - Ç5À under main flight performances practically did not concede to such known American bombers as Boeing B-16 and Boeing B-24 "Liberator", but had a little bit smaller altitude performance.
   Only 93 airplanes ÒÁ-7 (Ïå-8) have been constructed.