Cosmonauts:
    Upload:
        Vladimir A. Lyakhov [1], Commander
        Valeri V. Ryumin [2], Flight Engineer
    Download:
        (unmanned)
Backup:
    Leonid Popov
    Valentin Lebedev
Launch:
    Date: 25 February 1979
    Time: 11:54 UTC
Landing:
    Date: 13 June 1979
    Time: 16:18 UTC
Duration: 107 days, 4 hours, 24 minutes
Call Sign: Proton

The cosmonauts worked in the Salyut 6 space station.