Nikolai Rukavishnikov
…was a complete success. His third flight, Soyuz 33, was an Intercosmos flight to the Salyut 6 space station on 10 April 1979 with Bulgarian cosmonaut Georgi Ivanov. On its final approach, the spacecraft's main engine failed, and the docking was aborted. They were able to return to Earth with the backup engine, but…