These are the final moments of Aeroperú Flight 603. A simple mechanical error whereby duct tape was left over the pitot tubes rendered all navigation equipment on a rather sophisticated 757 useless. Altitude, speed, auto pilot, were all faulty as a result of this pitot tube blockage. And unfortunately, the ground based radar was reporting on faulty information revived from the planes transponder (known as secondary radar). These faulty readings complicated matters for pilots because of the various warnings the computer was throwing out. Not heard on the tape, they were also getting stall warnings in the way of a "stick shaker" notification. This is where the control yoke literally shakes to let the pilots know that stall procedures must happen immediately. However, they were also receiving overspeed notifications, which completely contradicts a stall warning. This is why the pilots don't respond to the low terrain warning, flooded with conflicting information, they trusted the towers false high altitude data. It is hard to fault the pilots, but the most proper thing was to go to 75-80% thrust and 5° inclination. This is nearly always a safe configuration when navigation systems are sputtering, but given the number of computer warning messages, nearly all of which were vital and critical to continued flight (and often times in conflict with each other), it would of been nearly impossible to know what a safe configuration would of been. Sometimes you are just doomed, and these are the last moments of 70 fated to die because of a simple piece of tape.