Launch from the Baikonur Cosmodrome; landing with Soyuz 34 capsule 295 km northwest of Dzheskasgan.

Following a one day solo flight the Soyuz docked with Salyut 6 on 26.02.1979. The cosmonauts became the third resident crew. During their residence unmanned cargo spacecrafts Progress 5 -7 and unmanned spacecraft Soyuz 34 docked with the station. The Soyuz 34 was needed, because of the failing docking attempt of the Soyuz 33 spacecraft. Soyuz spacecrafts could only be used for 90 days at this time. So a new one (unmanned) spacecraft was needed.

When they arrived on the station, they had to make preparing work, because the station had to be repaired (sprung propellant leak of the propulsion system). The tank repairing took some time, after the arrival of the Progress 5 spacecraft, but was successful. Testing new developed Gamma-Ray-Telescope. Experiments in materials science were also performed. A Progress spacecraft brought 10 m reflector to the spacestation, which unfolded independent at the stations tall. Test of the "Cosmic Radio-Telescope" (KRT-10). Both cosmonauts conducted an EVA on 15.08.1979 (1h 23m) to jettison the KRT-10 antenna from rear docking port and to inspect the exterior of Salyut 6. They also retrieved samples of materials from the stations hull.

All in all the crew set a new spaceflight record.