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re: Plane Crash in France - 148 on board

Posted on 3/24/15 at 2:22 pm to
Posted by HeyCap
Member since Nov 2014
612 posts
Posted on 3/24/15 at 2:22 pm to
Lots of erroneous information here and being distributed by the media. Not unexpected these days.

The Airbus has a good safety record, especially the A320/19/18 series. There is no problem with the autopilot although I could understand how certain aspects of it could be confusing. The autopilot controls all or nothing. The pilot cannot decide which flight surfaces he or she wants the autopilot to control. Perhaps in the Russian accident the author meant the computer that controls the ailerons was turned off. Big difference.
With that said, the autopilot can be completely disengaged and the Airbus can be flown just like non fly-by-wire aircraft using stick and rudder. (Side stick in Airbus' case!)
In fact, it is recommended by many operators that their flight crews turn off all of the "gee-whiz" stuff on occasion to get a feel for and practice flying the aircraft without automation. At least my company recommends that.

With that said, the Airbus is fly-by-wire and uses 5 different flight control computers which utilize electrical and hydraulic power to move flight surfaces. The only flight control surface with a mechanical linkage to the cockpit is the trimmable horizontal stabilizer(THS). As one would suspect, the computers have many reduncies as do all of the other systems. Total system failures are for the most part unheard of.

We need to give it a few days, maybe weeks or months to see what the investigators find before jumping to conclusions. Again, hard to do in this day of being able to "Google the answer" and get instant gratification, but there's usually a chain of events that occur during plane crashes and it takes careful investigation of the clues to discover the cause.
Oh, and 24 years isn't old for an airplane.
Boeing and Airbus driver
This post was edited on 3/24/15 at 2:28 pm
Posted by dewster
Chicago
Member since Aug 2006
25342 posts
Posted on 3/24/15 at 2:23 pm to
quote:

Is there any comfort to be had in actually finding the plane this time?


A definitive answer on what caused the accident is comforting....if that means finding the black box, then it is beneficial.

AirFrance 447 taught us about a possible flaw in cockpit communication and icing problems on the Airbus A330's pitot tubes. That was a problem that was corrected almost immediately by the airline and manufacturer. The Tenerife collision was a lesson on the importance of clear, standardized communication and robust air traffic/runway control. Alaska Air 261 taught us about the importance of diligent maintenance on the jack screw that controls the vertical stabilizer on some MD jets. Etc.

Corrective action brings comfort to fliers and improves safety. There is a lesson to be learned from any crash or hijacking one way or another. This is how we get better.
This post was edited on 3/24/15 at 2:29 pm
Posted by catholictigerfan
Member since Oct 2009
56010 posts
Posted on 3/24/15 at 5:22 pm to
quote:

I'm pretty sure this is the first blemish on the Airbus record to date. I knew nothing about the autopilot issues, but I fly on a brand new A319 for work all time. Love that thing. My dad also works for Airbus on the A330's. Never had any issues, but that thing is so technologically advanced I can see how it would be difficult to monitor something as simple as autopilot.


The auto pilot isn't to hard to control. Especially if you have been trained to do it.

Once you enter all the flight info, waypoints cruzing altitude weight fuel etc. It will get you to your destination and land it all from the computer all you have to do is press a couple buttons. It's not something a Layman can do but a trained pilot can easily control it.

I'm not a pilot or anything but I do read up in it, I'm sure real pilots can back me up on this.
Posted by 777Tiger
Member since Mar 2011
73856 posts
Posted on 3/24/15 at 5:28 pm to
quote:

It's not something a Layman can do

and don't you ever forget it!
Posted by catholictigerfan
Member since Oct 2009
56010 posts
Posted on 3/24/15 at 5:53 pm to
I wasn't claiming to be an expert but for a plane on autopilot to descend 31,000 feet in 8 minutes and the pilots didn't notice it or do anything about it makes no sense.

Especially a 10 year veteran pilot.

I was simply responding to the claim that the autopilot was complicated for a Layman yes but not a experienced veteran pilot.
Posted by Jim Rockford
Member since May 2011
98180 posts
Posted on 3/25/15 at 10:28 am to
quote:

Investigators said they had so far been unable to retrieve any data from the plane’s cockpit voice recorder, and the inquiry has been hampered further, an official said, by the discovery that the second black box, which was found on Wednesday, was severely damaged, and its memory card dislodged and missing.


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