Astronauts from the International Space Station have completed a third spacewalk to solve the latest glitch.
They are trying to fix a jammed joint that is supposed to keep the station's solar panels pointed towards the sun.
Scientists are still struggling to repair a new recycling system intended to convert astronauts' urine into drinking water.
During a previous space walk, the astronauts accidentally lost a tool box worth more than US $100,000.
This was the third spacewalk made by the crew to repair the International Space Station' solar panels.
Astronauts Heidemarie Stefanyshyn-Piper and Stephen Bowen sent almost seven hours working on the defective joint.
A total of four spacewalks are planned for the 11-day mission.