The French prosecutor in the Germanwings investigation is saying the co-pilot took deliberate action to send the aircraft into a descent. “At that moment, the co-pilot is controlling the plane by himself. While he is alone, the co-pilot presses the buttons of the flight monitoring system to put into action the descent of the plane. “This action on the altitude controls can only be deliberate.” “The most plausible interpretation is that the co-pilot through a voluntary act had refused to open the cabin door to let the captain in. He pushed the button to trigger the aircraft to lose altitude. He operated this button for a reason we don’t know yet, but it appears that the reason was to destroy this plane.” BBC
