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![]() wrote in message oups.com... Peter Duniho wrote: "George Patterson" wrote in message news:mle_e.11361$L15.4226@trndny01... I agree that a computer can do a great job when everything goes more or less according to plan, but what about when it doesn't? Actually, a computer can do a great job of anything you can think of. It has a problem if something comes up that nobody thought of How about: Pilots Battle Computer For Control Of 777 Stanley Kubrick couldn't have scripted anything more eerie than the real-life odyssey of a Malaysian Airlines Boeing 777 that seemed hell-bent on crashing itself on a trip from Perth to Kuala Lumpur last Aug. 1. According to The Australian newspaper, the Malaysian flight crew had to literally battle for control of the aircraft after something went wonky with the computerized controls. The plane was about an hour into the flight when it suddenly climbed 3,000 feet and almost stalled. The Australian Transport Safety Bureau http://www.atsb.gov.au/aviation/occurs/occurs_detail.cfm?ID=767 report said the pilot was able to disconnect the autopilot and lower the nose to prevent the stall but the autothrottles refused to disengage and when the nose pitched down they increased power. Even pushing the throttles to idle didn't deter the silicon brains and the plane pitched up again and climbed 2,000 feet the second time. The pilot was able to fly manually back to Perth but the autothrottles wouldn't turn off. As he was landing, the primary flight display gave a false low airspeed warning and the throttles firewalled again. The display also warned of a non-existent wind shear. Boeing spokesman Ken Morton said it was the only such problem ever experienced on the 777 but airlines have been told via an emergency AD http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgad.nsf/0/25F9233FE09B613F8625706C005D0C53?OpenDocument to load an earlier software version just in case. The investigation is focusing on the air data inertial data reference unit (HAL for short?), which apparently supplied false acceleration figures to the primary flight computer. |
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Pilots Battle Computer For Control Of 777
I also remember when it took two people to fire up the Tandem mainframe computer. Today PCs are more powerful than that old tandem. Don't fall into the belief that things can't change a lot in 25 years. -Robert |
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