No. With any mechanical system, failures happen. For safety, there needs to be a human available to adjust for the failure. According to the Smithsonian Channel's Air Disasters series, there are many times when the instruments, sensors, and automation indicate normal operation, but the pilot's seat-of-the-pants instincts as an aviator tell a different tale: something is wrong. This instinct or feeling has made the difference between life and a fatal crash.
During an emergency, if the airplane needs to land now!, the automation will look for an airport. A human pilot can, and has, considered other options, including highways, river levees, beaches, a farmer's field, and even the Hudson River. In each of those successful cases, no one was killed, there were no serious injuries, and the airplane was repaired and back in service within a month or two.
On longer flights, it is imperative that the task of piloting the airplane be switched of between at least two pilots to relieve strain, stress, fatigue, in some cases boredom, and to allow the pilot to stretch, move, and take care of other human functions.
__________________ Lord, grant me the serenity to accept that there are some things I just can’t keep up with, the determination to keep up with the things I must keep up with, and the wisdom to find a good RSS feed from someone who keeps up with what I’d like to, but just don’t have the damn bandwidth to handle right now. © 2009, Rex Hammock