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https://worldairlinenews.com/2011/09/29/air-nippon-first-officer-mistakes-the-rudder-trim-knob-for-the-cockpit-door-lock-sends-the-737-in-flight-almost-upside-down/
Air Nippon first officer mistakes the rudder trim knob for the cockpit door lock, sends the 737 in flight almost upside down