That determination needs to be made before the installation of a new station module, scheduled for Monday, because the module would be in the way should closer inspection of the wing be needed, NASA officials said.

CNN: Endeavour docks with space station

The air lock installation is the primary objective of the Atlantis mission, with the two-room chamber allowing space station crews to venture from the station in NASA spacesuits without the assistance of visiting shuttles.

CNN: Air lock installed on space station