As the plane was climbing through , the captain's ASI read . The autopilot, which was taking its airspeed information from the same equipment that was providing faulty readings to the captain's ASI, increased the pitch-up attitude and reduced power in order to lower the plane's airspeed. The first officer's ASI was giving a correct reading of and decreasing, yet the aircraft started to give multiple contradictory visible and audible warnings that it was flying too fast, including rudder ratio, Mach airspeed, and overspeed.