Don't tell that to the pilot of that A320 that was doing a demo flight at the Habsheim Airshow in June of 1988. He made a long, slow pass in front of the crowd with the bird really dirtied up for landing and was going to suck everything up and go on his way. The autopilot was holding the thing steady all the way down the runway for this pass. The pilot attempted to disengage the autopilot and it immediately argued with him, saying in effect "you've got the airplane with everything down so you are apparently going in to land, and you WILL land." He attempted to disengage the thing but Col Computer had locked the throttles and flight surfaces into a landing configuration and applying throttle and trying to move the flight surfaces didn't work, Computer returned everything to "landing" settings. Aircraft settled into a dense stand of trees at the EOR and crashed. Video does exist of this incident. The pilot survived but three PAX did not. Regardless, I DO know Airbus shamelessly attempted to pin the blame on him and absolve the computer - and the manufacturer. Airbus had over 500 aircraft on order, and the type was in the middle of the certification process in the US, so they had megabucks at stake. They did this by changing out the black box post-crash, and manipulating the data presented by the computer, and basically forging the black box output, so under analysis it supported their position. There is a book written on the subject by the former head of the French Airline Pilots' Union (and former leader of the Patrouille de France) that describes the chicanery of the Airbus firm, and the French govt, in attempting to destroy the reputation of the pilot involved and whitewash this crash. This incident is a black mark against Airbus they are still trying to live down. It's not helped by problems experienced by other Airbus products since this crash.