(AP) -- Endeavour's six astronauts have checked the systems they need to bring NASA's next-to-last space shuttle flight to an end.
Commander Mark Kelly and his crew spent Monday night and Tuesday morning getting their spacecraft ready to come home. All the critical landing equipment tested fine.
Endeavour is due to land at 2:35 a.m. Wednesday at Kennedy Space Center in Florida. NASA will keep a close eye on the crosswind.
The shuttle left the International Space Station over the weekend. The astronauts put the finishing touches on the orbiting lab, installing a cosmic ray detector, an extension beam and a platform full of spare parts.
This is Endeavour's final voyage. After landing, it will head to a museum in California.
Explore further: Shuttle astronauts bid farewell to space station