Soyuz 40 was a Soviet space mission launched on May 15, 1981. It was part of the Soyuz program and carried two cosmonauts: Viktor Patsayev and Yuri Malyshev. The mission's primary objective was to transport the crew to the Salyut 7 space station, where they conducted scientific experiments and performed maintenance tasks. The mission lasted for 7 days, 20 hours, and 42 minutes, concluding with a successful landing on May 23, 1981. Soyuz 40 was notable for being the last mission to the Salyut 7 station, marking an important chapter in the history of human spaceflight.