two studies of automation bias in aviation discovered a higher rate of commission errors than omission errors, while another aviation study found 55% omission rates and 0% commission rates. automation-related omissions errors are especially common during the cruise phase. when a china airlines flight lost power in one engine, the autopilot attempted to correct for this problem by lowering the left wing, an action that hid the problem from the crew. when the autopilot was disengaged, the airplane rolled to the right and descended steeply, causing extensive damage. the 1983 shooting down of a korean airlines 747 over soviet airspace occurred because the korean crew "relied on automation that had been inappropriately set up, and they never checked their progress manually."