The new double robotic arm on the space station has been successfully assembled

However, on the third spacewalk, the Endeavor crew failed to install an experiment on the exterior of the European component Columbus. Another attempt - in one of the two spacewalks left for the mission

Space Shuttle Endeavor crew members on mission STS-123 and members of the Space Station's 16th crew began a new day of activity with the robotic arm.

The Canadian arm of the International Space Station, Canadarm2, was able to remove the protective shroud that secured the transfer of the new Dexter Double Arm to the station and returned the shroud to the cargo deck of the space shuttle Endeavour, for its return to Earth.

The Canadian double Dexter arm is the last component of the station's mobile service component. Astronauts Rick Linneman and Mike Foreman completed the Dexter train on the mission's second spacewalk on Sunday.

During the third spacewalk, yesterday (Tuesday), the two astronauts successfully attached the robotic arm to the station. However, Robert Behnken encountered problems in setting up a scientific experiment for the European Columbus laboratory. He was unable to attach the experiment, which was the size of a suitcase, to its place on the side of the station and he had to return it to the cargo deck of the shuttle. "You did the right thing, Bob," Rick Linneman, his spacewalk partner, told him. "No one would have done it better." Experts on the ground will try in the next two days to locate the cause of the problem and find a way to fix it.

The team members also began preparing the hardware that will be used in the experiment to repair the shuttle's heat protection tiles on the fourth spacewalk scheduled for Friday, and also had some free time to rest.

Furman and Robert Behnken will begin the mission around midnight on Friday Israel time. The two will carry out tasks that include, among other things, the trial of repairing the heat shield and will replace a damaged circuit on the outside of the station.