The hatches between Discovery and the International Space Station will close Sunday afternoon, and the shuttle will undock first thing Monday.
Both crews worked to rejuvenate the space station's air system.
The oxygen generator as well as the carbon dioxide removal system
have been acting up.
They also made sure a Japanese cargo carrier was loaded properly
The supply ship will be let loose at the end of this month and plunge through the atmosphere, burning up.
The vessel is full of packing foam and launch restraints from all the equipment that was delivered by Discovery.
The foam encasing the humanoid robot R2 will be stuffed in as well, once the astronauts unwrap it.
(Copyright 2011 by The Associated Press. All Rights Reserved.)