Users Online Now: 786 (Who's On?)		Visitors Today: 154,932
Pageviews Today: 386,114	Threads Today: 479	Posts Today: 7,662
07:29 PM

News

Back to Forum

Post New Thread

View Favorites

More plane crash info:

RSS

Anonymous Coward
User ID: 695353
6/5/2009 1:42 AM
Report abusive post

More plane crash info:

Quote

[link to www.latimes.com]

Air France jet's flight-control system under scrutiny
Automated messages before the crash point to a failure of the system that flies the plane most of the time, experts say. Weather looks like less of a factor.
By Ralph Vartabedian
June 5, 2009
A sophisticated flight-control system that relies on electronic instruments and computers came under growing scrutiny Thursday as investigators tried to unravel the mysterious crash of an Air France Airbus 330 into the Atlantic.

A series of messages sent automatically by the jet moments before it plunged into the ocean late Sunday with 228 passengers and crew members aboard has raised speculation that the crash might have involved a malfunction of the automated system that flies the plane most of the time.

One of the messages reported that one of the plane's navigational control units had failed and that, almost simultaneously, the autopilot system had disengaged.

The sequence of events forced the crew of Flight 447 to fly the jet manually, a difficult task on an Airbus traveling at high altitude near its maximum speed, aviation experts said. Any significant change in airspeed could have caused the plane to lose lift or stability, both potentially deadly conditions.

Meanwhile, new analysis of the weather in the vicinity at the time of the crash appears to cast doubt on earlier reports that the plane encountered severe thunderstorms, lightning and wind gusts. Though there were storms, they were almost certainly less intense than those sometimes encountered above the United States, and lightning was at least 150 miles away, said Greg Forbes, severe-weather expert for the Weather Channel.

Forbes said an examination of weather data for Sunday, including satellite images, indicated updrafts of perhaps 20 mph, far from the initial reports of 100 mph.

"I wouldn't expect it to be enough to break apart the plane," Forbes said.

Though experts generally agreed Thursday that weather alone did not explain the crash, USC aviation safety expert Michael Barr said the investigation was still wide open.

"You can never disregard any possibility until you can prove what happened," Barr said. "The key here is to determine what the crew could have done after the initial event. Or was there nothing they could have done and they were just along for the ride?"

Air France executives said the plane had sent out a series of messages indicating technical failures, confirming news reports in Brazil and data that U.S. aviation experts had already gained access to.

A series of serious electronic breakdowns occurred on the Airbus over a four-minute period before the jet plunged into the sea, said Robert Ditchey, an aeronautical engineer, pilot and former airline executive.

The sequence started with an autopilot failure and a loss of the air data inertial reference unit, a system of gyroscopes and electronics that provides information on speed, direction and position. That system has been involved in two previous incidents that caused Airbus jetliners to plunge out of control, though the pilots were able to recover.

The automated messages then indicate that a fault occurred in one of the computers for the major control surfaces on the rear of the plane. Such a failure would have compounded the problems, particularly if the pilots were flying through even moderate turbulence.

The last message indicates that multiple failures were occurring, including pressurization of the cabin. Such a message would have reflected either a loss of the plane's pressurization equipment or a breach of the fuselage, resulting in rapid decompression.

All of these issues would have made the plane difficult to control.

When cruising at high altitude, a plane must fly within a fairly small window of speed, said Robert Breiling, an aviation safety expert in Florida. If speed drops even slightly, the plane can lose lift. If the speed is too high, it causes instability over the control surfaces.

"Flying a big jetliner at high altitude without autopilot, you have your hands full," Breiling said.

Ditchey said the Airbus software would have left the crew with a very small margin of error, where even minor buffeting could have boosted the risk of losing control.

"As they got into a degraded regime, they probably got into a bigger and bigger pickle," Ditchey said.

[link to news.xinhuanet.com]

<object width="425" height="344"><param name="movie" value=" [link to www.youtube.com] name="allowFullScreen" value="true"></param><embed src=" [link to www.youtube.com] type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed></object>

Anonymous Coward
User ID: 528157
6/5/2009 1:52 AM

Re: More plane crash info:	Quote
bomb

Anonymous Coward
User ID: 528157
6/5/2009 2:01 AM

Re: More plane crash info:	Quote
A Spanish pilot in the vicinity at the time reported seeing an "intense white flash". "Suddenly we saw in the distance a strong and intense flash of white light, followed by a downward, vertical trajectory which broke up into six segments," the chief pilot of an Air Comet plane from Lima to Madrid told the Spanish newspaper, El Mundo. He has reported his observations to investigators.

RememberThis Subscriber

Oh Shit!
User ID: 691948
6/5/2009 2:03 AM

Re: More plane crash info:	Quote
bomb "Got myself a one way ticket, goin' the wrong way". ~Bon Scott~ "21 gun Salute, Kills 21 People" ~George Carlin~ ~Beer: Helping white men dance since 1856~

Back to Forum

Post New Thread

View Favorites

Disclaimer:
This website exists for entertainment purposes only. The reader is responsible for discerning the validity, factuality or implications of information posted here, be it fictional or based on real events. Moderators on this forum make every effort to review the material posted on this site however, it is not realistically possible for our small staff to manually review each and every one of the more than 10,000 posts GodlikeProductions gets on a daily basis.

The content of post on this site, including but not limited to links to other web sites, are the expressed opinion of the original poster and are in no way representative of or endorsed by the owners or administration of this website. The posts on this website are the opinion of the specific author and are not statements of advice, opinion, or factual information on behalf of the owner or administration of GodlikeProductions. This site may contain adult content and if you feel you might be offended by such content, you should log off immediately.

Not all posts on this website are intended as truthful or factual assertion by their authors. Some users of this website are participating in internet role playing, with or without the use of an avatar. NO post on this website should be considered factual information on face value alone. Users are encouraged to USE DISCERNMENT and do their own follow up research while reading and posting on this website. Godlikeproductions.com reserves the right to make changes to, corrections and/or remove entirely at any time posts made on this website without notice. In addition, Godlikeproductions.com disclaims any and all liability for damages incurred directly or indirectly as a result of a post on this website.

This site is provided "as is" without warranty of any kind, either expressed or implied. You should not assume that this site is error-free or that it will be suitable for the particular purpose which you have in mind when using it. In no event shall Godlikeproductions.com be liable for any special, incidental, indirect or consequential damages of any kind, or any damages whatsoever, including, without limitation, those resulting from loss of use, data or profits, whether or not advised of the possibility of damage, and on any theory of liability, arising out of or in connection with the use or performance of this site or other documents which are referenced by or linked to this site.

Some events depicted in certain posting and threads on this website may be fictitious and any similarity to any person living or dead is merely coincidental. Some other articles may be based on actual events but which in certain cases incidents, characters and timelines have been changed for dramatic purposes. Certain characters may be composites, or entirely fictitious.

We do not discriminate against the mentally ill!

Fair Use Notice:
This site may contain copyrighted material the use of which has not always been specifically authorized by the copyright owner. Users may make such material available in an effort to advance awareness and understanding of issues relating to civil rights, economics, individual rights, international affairs, liberty, science & technology, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C.Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes.
For more information please visit:
http://www.law.cornell.edu/uscode/17/107.shtml

Please be aware any communications sent complaining about a post on this website may be posted publicly at the discretion of the administration.

This Disclaimer is subject to change at anytime.

Mail Webmaster with questions or comments about this site.

Privacy Policy - Terms Of Use

Copyright 1999-2009 © GodLikeProductions.com

Page generated in 0.074s (5 queries)