Soyuz 7K-T No.39, (also named
Soyuz 18a or
Soyuz 18-1) was an unsuccessful launch of a manned Soyuz spacecraft by the
Soviet Union on April 5, 1975. The mission was expected to dock with the orbiting
Salyut 4 space station, but due to a failure of the Soyuz launch vehicle the crew failed to achieve orbit.
The accident was the result of a failure of a rocket staging event; the core booster of the Soyuz rocket did not separate from its upper stage. Since the accident took place after the escape tower had jettisoned, the Soyuz 7K-T spacecraft needed to use its own propulsion module engines to escape the failing rocket.
The escape exerted excessive g forces on the crew, consisting of commander Vasili Lazarev, an Air Force major, and flight engineer Oleg Makarov, a civilian. Both cosmonauts were injured, with Lazarev suffering injuries serious enough to end his career. The descent module landed near Aleysk, in the Altai Mountains; the crew initially feared they landed in the People's Republic of China, leading them to burn their paperwork in case they were captured by the Chinese, whom the Soviet Union were at odds with at the time.
The accident was disclosed by the normally secretive Soviets, as it occurred during preparations for their joint Apollo–Soyuz Test Project with the United States three months later. This would prove to be the last manned Soyuz mission launched with the original Soyuz rocket; future missions would be launched by the updated Soyuz-U rocket.
Joseph Francis Shea (September 5, 1925 – February 14, 1999) was an
American aerospace engineer and
NASA manager. Born in the
New York City borough of
the Bronx, he was educated at the
University of Michigan, receiving a
Ph.D. in
Engineering Mechanics in 1955. After working for
Bell Labs on the radio
inertial guidance system of the
Titan I intercontinental ballistic missile, he was hired by NASA in 1961. As Deputy Director of NASA's Office of Manned Space Flight, and later as head of the Apollo Spacecraft Program Office, Shea played a key role in shaping the course of the
Apollo program, helping to lead NASA to the decision in favor of
lunar orbit rendezvous and supporting "all up" testing of the
Saturn V rocket. While sometimes causing controversy within the agency, Shea was remembered by his former colleague
George Mueller as "one of the greatest
systems engineers of our time".
Deeply involved in the investigation of the 1967 Apollo 1 fire, Shea suffered a nervous breakdown as a result of the stress that he suffered. He was removed from his position and left NASA shortly afterwards. From 1968 until 1990 he worked as a senior manager at Raytheon in Lexington, Massachusetts, and thereafter became an adjunct professor of aeronautics and astronautics at MIT. While Shea served as a consultant for NASA on the redesign of the International Space Station in 1993, he was forced to resign from the position due to health issues.