34, establishing a new space-endurance record of 175 days, surpassing the 139-day mission by the Soyuz 29 crew in 1978. Legacy Years later, a similar scenario of crew return was required in 2022. As Soyuz MS-22, due a coolant leak in external radiator, was unable to perform crew return, it returned uncrewed with cargo, instead of crew, like Soyuz 32 and Soyuz MS-23 was launched unmanned with cargo like Soyuz 34 as a replacement, to return the MS-22 crew. See also Soyuz MS-22 Soyuz MS-23 References Crewed Soyuz missions 1979 in the Soviet Union Spacecraft launched in 1979 Spacecraft which reentered in 1979 Spacecraft launched by Soyuz-U rockets