article_snippet: the photo showed its door’s lock out of position while a plane was in the air at Air China’s busiest airport, drawing criticism from air safety experts.
article_snippet: This photo showing a plane door's lock out of position went viral on Chinese social media networks .
article_snippet: Chinese state media agency Xinhua said a thorough investigation, including interviews with the plane found that a plane door's lock was in the ‘normal’ position when the flight took off.
article_snippet: Air China said an investigation found that the lock was in the ‘normal’ position when the flight took off the flight .
highlights_snippet: Air China said that the lock was in the 'normal' position during take-off .
  