(AP) — NASA is taking a close look at two new problems on space shuttle Endeavour.

A round ceramic spacer near one of the cockpit windows is sticking out. And a thermal tile repair that was made before the flight has failed, and the original crack is back, right over the cockpit.

Mission management team leader LeRoy Cain said Wednesday that neither problem appears to be serious. But he said everyone wants to be "very vigilant and take a closer look" in case spacewalking repairs are needed.

NASA has been extra careful about such matters since Columbia was brought down by a cracked wing in 2003.

The good news Wednesday was that Endeavour's heat shield looks to be in overall good shape. The shuttle arrived at the International Space Station early Wednesday.

From celebrating America's 250th birthday to a new ride at Adventureland, NewsdayTV's Elisa DiStefano and Newsday lifestyle editor Meghan Giannotta have your inside look at Newsday's summer FunBook. Credit: Newsday/Howard Schnapp, Kendall Rodriguez, Drew Singh; Anthony Florio, Randee Daddona, Morgan Campbell, Debbie Egan-Chin

Get ready for sun and fun with NewsdayTV's summer FunBook special! From celebrating America's 250th birthday to a new ride at Adventureland, NewsdayTV's Elisa DiStefano and Newsday lifestyle editor Meghan Giannotta have your inside look at Newsday's summer FunBook.

From celebrating America's 250th birthday to a new ride at Adventureland, NewsdayTV's Elisa DiStefano and Newsday lifestyle editor Meghan Giannotta have your inside look at Newsday's summer FunBook. Credit: Newsday/Howard Schnapp, Kendall Rodriguez, Drew Singh; Anthony Florio, Randee Daddona, Morgan Campbell, Debbie Egan-Chin

Get ready for sun and fun with NewsdayTV's summer FunBook special! From celebrating America's 250th birthday to a new ride at Adventureland, NewsdayTV's Elisa DiStefano and Newsday lifestyle editor Meghan Giannotta have your inside look at Newsday's summer FunBook.

SUBSCRIBE

Unlimited Digital AccessOnly 25¢for 6 months

ACT NOWSALE ENDS SOON | CANCEL ANYTIME