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(180514) -- CHENGDU, May 14, 2018 (Xinhua) -- Flight 3U8633, operated by Sichuan Airlines, prepares to conduct emergency landing after a mechanical failure in Chengdu Shuangliu International Airport in Chengdu, capital of southwest China's Sichuan Province, May 14, 2018. Part of the cockpit window broke as the Airbus A319 flew over Chengdu. The plane was en route from southwest China's Chongqing Municipality to Lhasa, capital of Tibet Autonomous Region. It was forced to divert to an alternate airport in Chengdu. All passengers are safe, although the co-pilot sustained injuries to the face and waist, and another crew member was slightly hurt during the emergency landing. After the landing on Monday morning, the airline has arranged another flight to take the passengers to Lhasa. (Xinhua/Wan Bi) (ry) (Photo by Xinhua/Sipa USA)
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(180514) -- CHENGDU, May 14, 2018 (Xinhua) -- Flight 3U8633, operated by Sichuan Airlines, prepares to conduct emergency landing after a mechanical failure in Chengdu Shuangliu International Airport in Chengdu, capital of southwest China's Sichuan Province, May 14, 2018. Part of the cockpit window broke as the Airbus A319 flew over Chengdu. The plane was en route from southwest China's Chongqing Municipality to Lhasa, capital of Tibet Autonomous Region. It was forced to divert to an alternate airport in Chengdu. All passengers are safe, although the co-pilot sustained injuries to the face and waist, and another crew member was slightly hurt during the emergency landing. After the landing on Monday morning, the airline has arranged another flight to take the passengers to Lhasa. (Xinhua/Wan Bi) (ry) (Photo by Xinhua/Sipa USA)
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(CNN) —  

Experiencing a little turbulence is pretty common for frequent fliers.

Looking out the window and seeing the plane’s innards on display? Not so much.

Passengers aboard Delta Air Lines Flight 762 from Atlanta to Chicago got a little more than sloshed drinks when the cabin lights came on at 28,000 feet Sunday afternoon.

Those with a window seat got quite the view: The piece covering the plane’s right engine – or cowling, as it’s called – had come off.

As photos posted by CNN affiliate WTVF showed, the loose piece then appeared to have struck part of the fuselage.

The pilot declared an emergency, and the plane landed safely in Nashville.

The 109 passengers aboard the Boeing 717 walked away uninjured, but with quite a tale to tell.

Delta said it’s been in touch with passengers with “a gesture of apology.” And it’s investigating exactly what went wrong.