Air France Flight 447
Then, at 2.08 a.m. Bonin changed the autopilot's heading knob to the left due to turbulence. At 2:10 and 5 seconds, both the autopilot and the auto thrust functions switched off because of icing on the outside senors, which caused the plane to receive the wrong airspeed readings. Bonin, in response, said, "I have control." before using the controls to correct the plane's slight right turn. He corrected this for the next 30 seconds as he pitches the aircraft up to balance for the "loss of altitude" that the electronic flight screens were showing him (which actually turned out to be false). As the stall warning and altitude warning horn activated, a surprised Robert noticed this and asked Bonin to watch his speed and descend. Bonin put down the nose, and the A330 no longer climbed as fast as it did previously. However, the plane was still climbing faster than normal.