order of business was to restore electric power. Two of the eight batteries were destroyed, the rest fully discharged. Dzhanibekov determined that a sensor in the solar array pointing system had failed, preventing the batteries from recharging. A telemetry radio problem prevented the TsUP (mission control center) from detecting the problem. Salyut 7 had quickly run down its batteries, shutting down all its systems and accounting for the break in radio contact. The cosmonauts set about recharging the batteries and used Soyuz T-13 to turn the station in order to point its solar arrays to the sun. On June 10 they turned on the air heaters. The cosmonauts relied on the Soyuz T-13 air regeneration system until they could get the Salyut 7 system back in order. On June 13 the attitude control system was successfully reactivated. This was cause for jubilation, as it meant Kosmos 1669 (a Progress supply spacecraft) bearing replacement parts could dock with Salyut 7. The station's water tanks thawed by the end of June – freezing had destroyed the water heater, so the cosmonauts used a powerful television light to heat fluids. Wall heaters were turned on only after all the frost had evaporated, in order to prevent water from entering equipment. Normal atmospheric humidity was achieved only at the end of July, nearly two months after docking. See also 2010: The Year We Make Contact, a 1984 science fiction film which depicts the revival of an inert spacecraft by a joint Soviet/American crew Salyut 7, a 2017 Russian film dramatizing the events of Soyuz T-13 Soyuz 10, the first mission to dock to a space station, which had to be aborted as hard-dock with Salyut 1 was not achievable Soyuz T-15, a mission to ferry equipment from Salyut 7 to Mir, which had to manually maneuver and dock to Mir United States' Space Shuttle missions around this time: STS-51-G (launched in June 1985) STS-51-F (July-August 1985) STS-51-I (August-September 1985) References External links Spacefacts.de – Crew Photo: Soyuz T-13 - image of crew Crewed Soyuz missions 1985 in spaceflight 1985 in the Soviet Union Spacecraft launched in 1985