A China Southern Airlines flight destined for Guangzhou made an emergency landing this morning after the cover of the engine “stripped off,” according to Guangzhou Daily‘s microblog.

Photo credit: Kankanews.com

At around 10:30 a.m., shortly after flight CZ3624 set off from Harbin Taiping International Airport, a large thud could be heard on the plane, according to a passenger who posted what happened online.

The plane circled for over an hour before returning to the airport.

China Southern Airlines was honored with the Five-Star Flight Safety Award by the Civil Aviation Administration of China in 2008.

Earlier this year, a Shenzhen Airlines flight to Beijing made an emergency landing in Wuhan after a burning smell was detected in the cockpit.