"The next thing I know my co-pilot had been sucked halfway out of the window", he said.
An unnamed passenger told China News Service: 'The crew were serving us breakfast when the aircraft began to shake.
"Everything in the cockpit was floating in the air", the captain said, according to the BBC. "Most of the equipment malfunctioned ... and I couldn't hear the radio." he added. All passengers were safe, although the co-pilot sustained injuries to the face and waist, and another crew member was slightly hurt during the emergency landing.
Passengers described a loud bang, and said they felt the plane go into free fall for a few seconds before it stabilized.
Flight 3U8633 departed Chongqing, China and was heading to Lhasa, Tibet, when Liu noticed a loud noise inside the cabin.
French aviation investigators are sending staff to China to find out what happened, reports said.
There has been no information given as to what caused the windshield to break off. Sichuan Airlines said the flight had experienced a "mechanical failure" without providing any further details. Airbus A319s can carry up to 160 passengers and are widely used around the world by European and U.S. airlines. According to its website, it operates on routes to Los Angeles and Vancouver, among other destinations.
In 1990, one of the pilots on British Airways Flight 5390 was blown partially out of the cabin window after its windshield blew out at 7,000 metres.
Shaking violently, the plane plunged to 24,000 feet.
"The sudden loss of pressure and low temperature made me very uncomfortable and it was very hard to make a single move when the aircraft was flying at 900 kilometers (560 miles) an hour and at such a high altitude", Liu said, according to the Morning Post. "Fortunately, he was wearing a seat belt".
"The pressure inside the airplane is escaping out that hole to attempt to equalise, which is why it's creating that suction and pulling from inside the aircraft". The victim, Jennifer Riordan, was also partially sucked out of the window.
'I'm still nervous. I don't dare to take an aeroplane anymore.
However, none of the plane's 119 passengers were injured and the aircraft safely landed at Chengdu Shuangliu Airport in southern China.