# fc157 Soyuz-33 USSR-Bulgaria flight 5 flown covers

Covers taken on board Soyuz-33 by Soviet flight commander Nikolai Rukavishnikov to be carried to Salyut-6 station.Soyuz suffered major engine failure during final approach to Salyut on april-12.Cosmonauts Rukavishnikov and Georgi Ivanov (Bulgarian) were forced to use a back up engine to return to Earth.During return both signed covers and cancelled them with Soviet and Bulgarian Soyuz-Salyut on board handstamps intended to be delivered to Salyut-6 station.On return these covers were given to a frien-cosmonaut Vasiliy Lazarev (all are notared `To Lazarev`)