Florida ? Astronauts ran into trouble trying to move the International Space Station’s fancy new observation deck late Sunday, and the job was put on hold as Mission Control debated what to do.

Space station commander Jeffrey Williams was loosening a series of bolts to release the domed lookout from the newly installed Tranquility room when one of them jammed. He backed out of the procedure and tried again. Then, another bolt jammed. Mission Control informed the station and shuttle crews that engineers were reviewing what happened.

The $27 million lookout was launched last week in a temporary position on Tranquility that allowed it to fit in Endeavour’s payload bay.