A scare on board Southwest Airlines flight from Chicago to Newark, N.J. Wednesday when a window cracked.  The pilot of flight 957 diverted to Cleveland.

Photos taken from inside the plane show a clear crack, but Southwest tweeted that it was an “outer pane.”

The Associated Press adds:

“Southwest Airlines spokeswoman Brandy King said that the pilots decided to land in Cleveland “for maintenance review” of one layer in a multi-layered window pane. She said the plane never lost cabin pressure — that would have triggered oxygen masks to drop down for passengers — and that the pilots did not declare an emergency before landing.

King said there were no other mechanical problems with the plane, which was taken out of service. The airline was trying to make arrangements to get the 76 passengers to Newark on another plane.”

This comes just two weeks after an engine blew on Southwest flight 1380,  killing one passenger.