Air Algerie Loses Contact With Plane After Takeoff

http://online.wsj.com/articles/conv...418497?mod=WSJ_hppMIDDLENexttoWhatsNewsSecond

PARIS—French investigators haven't been able to analyze cockpit conversations from the black boxes recovered from the Air Algérie jetliner that crashed in Mali last month, frustrating efforts to establish the cause of the accident.

Investigators have recovered the plane's two black boxes and managed to extract a recording of the conversations in the cockpit, but the sounds are "unintelligible," said Rémi Jouty, director of the French agency that investigates airplane crashes. Mr. Jouty said the reason was probably a malfunction of the recorder.

The team of investigators into the crash—comprising officials from Spain, Algeria, Mali, Burkina Faso and the U.S.—have been able to establish the airplane's trajectory before the crash thanks to data recorded by the other black box.

The plane first changed course when approaching an area of turbulence over eastern Mali in the early hours of July 24, and then apparently nose-dived and crashed, Mr. Jouty said at a news conference held in Paris with an official from Mali.

He said the investigation suggests the plane didn't explode in the air, but disintegrated when hitting the ground. The investigators will release a preliminary report in mid-September on the disaster, which cost the lives of 118 passengers.
 
http://online.wsj.com/articles/conv...418497?mod=WSJ_hppMIDDLENexttoWhatsNewsSecond

PARIS—French investigators haven't been able to analyze cockpit conversations from the black boxes recovered from the Air Algérie jetliner that crashed in Mali last month, frustrating efforts to establish the cause of the accident.

Investigators have recovered the plane's two black boxes and managed to extract a recording of the conversations in the cockpit, but the sounds are "unintelligible," said Rémi Jouty, director of the French agency that investigates airplane crashes. Mr. Jouty said the reason was probably a malfunction of the recorder.

The team of investigators into the crash—comprising officials from Spain, Algeria, Mali, Burkina Faso and the U.S.—have been able to establish the airplane's trajectory before the crash thanks to data recorded by the other black box.

The plane first changed course when approaching an area of turbulence over eastern Mali in the early hours of July 24, and then apparently nose-dived and crashed, Mr. Jouty said at a news conference held in Paris with an official from Mali.

He said the investigation suggests the plane didn't explode in the air, but disintegrated when hitting the ground. The investigators will release a preliminary report in mid-September on the disaster, which cost the lives of 118 passengers.

The "apparently nose-dived" statement made me think of Alaska 261. Wild speculation to be sure, and just throwing it out there. Hopefully the the investigators will find the true cause of the crash.
 
These new details are pretty scary. I wonder what happened...something broke off in turbulence maybe? A "nose-dive" from cruise sounds intense...
 
"The aeroplane’s pitch and bank were then subject to significant changes. They reached,
respectively, 80° nose-down and 140° bank to the left. "

Oh man...

I'm currently reading volume 1 of Air Disasters by Macarthur Job, there are a few examples in that book of planes running into storms and not making it out. The Northwest 720 and Braniff Bac 1-11 accidents I've read about so far had some especially nasty breakup sequences. Huge thunderstorms are no joke, must have been a horrible way to go...
 
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Seems like they're maybe heading for engine ice? But then they got the engines back and flew in to the ground at high speed? Peculiar.
 
"The aeroplane’s pitch and bank were then subject to significant changes. They reached,
respectively, 80° nose-down and 140° bank to the left. "

Oh man...

I'm currently reading volume 1 of Air Disasters by Macarthur Job, there are a few examples in that book of planes running into storms and not making it out. The Northwest 720 and Braniff Bac 1-11 accidents I've read about so far had some especially nasty breakup sequences. Huge thunderstorms are no joke, must have been a horrible way to go...

Southern Airways 242. A very interesting one when it comes to running into storms.
 
Yeah that Southern crash is sobering. Didn't have a chance, really, but came close to making it.
Yeah, the CVR is especially eerie with the conversation making it seem like everything was under control and then it all went South so quickly. I think the last words were "I got it". I wonder if they had ditched in a field like they discussed before ditching on the highway, if they would have made it out better.
 
I hope they were able to get enough of the threaded elevator jack to examine it.

Well, one must always look at previous accidents on type, of course, but from what I can see in the (admittedly interim) report, it doesn't really fit a jackscrew failure. I'd expect a lot less roll/spiral and a lot more immediate vertical, well, what, plunge?
 
Well, one must always look at previous accidents on type, of course, but from what I can see in the (admittedly interim) report, it doesn't really fit a jackscrew failure. I'd expect a lot less roll/spiral and a lot more immediate vertical, well, what, plunge?

They rolled quite a bit.
 
By no means out of the question. My impulse is to think that the weird EGT/autothrottle stuff is the genesis of the accident, but it's all wide open as it stands. It will be interesting, and I hope instructive, to read the final report.
 
Hopefully the the investigators will find the true cause of the crash.

I assume the French will do a more credible job of investigating the accident than what's been done so far on the Dana Air MD-83 crash in Lagos. It's a very strange accident with no solid explanation to date as far as I know (If you've got any later info, please post):


http://www.aib.gov.ng/reports/Interim Report 2a - Dana Air Flight 992 prelim.pdf

http://www.aib.gov.ng/reports/2nd INTERIM STATEMENT ON DANA AIRLINES.pdf
 
I assume the French will do a more credible job of investigating the accident than what's been done so far on the Dana Air MD-83 crash in Lagos. It's a very strange accident with no solid explanation to date as far as I know (If you've got any later info, please post):


http://www.aib.gov.ng/reports/Interim Report 2a - Dana Air Flight 992 prelim.pdf

http://www.aib.gov.ng/reports/2nd INTERIM STATEMENT ON DANA AIRLINES.pdf
Especially with a "second similar incident" occurring on the same plane, at the same airline. 5N-RAM was an ex-Alaska plane and I remember reading that Dana Air went after Alaska and found the plane was a hanger queen over there.
 
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