Astronaut Jessica Watkins replaces components on the Major Constituents Analyzer (MCA) in the U.S. Destiny laboratory module's Avionic Rack.
iss067e184982 (July 12, 2022) — Expedition 67 Flight Engineer and NASA astronaut Jessica Watkins replaces components on the Major Constituents Analyzer, a life support device in the U.S. Destiny laboratory module, that ensures oxygen and carbon dioxide levels remain safe aboard the International Space Station.