The launch of space shuttle Discovery and a five-man crew has been rescheduled for Feb. 23, five days later than planned.

The schedule change does not reflect any technical problem, only that extra time is needed to prepare Discovery for flight, Lisa Malone, a NASA spokeswoman, said Wednesday.However, she said that before a launch can occur engineers must resolve tile and cracked bearing problems that developed during the December flight of the shuttle Atlantis.