Air China flight from Hong Kong to Dalian drops 25,000 feet in 10 minutes after loss of cabin pressure

An Air China plane that departed Hong Kong for Dalian on Tuesday night dropped 25,000 feet in 10 minutes, triggering the release of oxygen masks from the cabin ceiling, though the aircraft later landed safely in the northern city, flight data indicated.

At least two passengers posted photos on social media showing those aboard flight CA106 wearing masks but looking calm.