Maintenance of the International Space Station

Astronaut Scott Parazynski of STS-120 conducted a 7-hour, 19-minute spacewalk to repair (essentially sew) a damaged solar panel which helps supply power to the International Space Station. NASA considered the spacewalk dangerous with potential risk of electrical shock.

Since construction started, the International Space Station programme has had to deal with several maintenance issues, unexpected problems and failures. These incidents have affected the assembly timeline, led to periods of reduced capabilities of the station and in some cases could have forced the crew to abandon the space station for safety reasons, had these problems not been resolved.