Cosmonauts:
    Vasili G. Lazarev [2], Commander
    Oleg G. Makarov [2], Flight Engineer
Backup:
    Pyotr Klimuk
    Vitali Sevastyanov
Launch:
    Date: 5 April 1975
    Time: 11:00 UTC
Landing:
    Date: 5 April 1975
    Time: 11:20 UTC
Duration: 20 minutes
Call Sign: Ural (Urals)

The flight was aborted shortly after launch due to a stage separation failure. The crew was safely recoved, although both were injured. Makarov recovered and flew again. For Lazarev, the injuries prevented him from going into space again. Because of the altitude attained (180 km), this mission is classed as a space flight.

The landing was near the Chinese border. The cosmonauts feared they may have actually ended up in China and faced arrest.