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  #16  
Old 03-25-2015, 12:05 PM
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FDR's used to run on a metal tape.
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  #17  
Old 03-25-2015, 12:15 PM
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Quote:
Originally Posted by Dudesky View Post
FDR's used to run on a metal tape.
Flight Data Recorder Rule Change

They went all-digital in the 1990s due to government requirements requiring more data to be recorded.
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  #18  
Old 03-25-2015, 12:17 PM
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Read the AD on the previous page...
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  #19  
Old 03-25-2015, 12:24 PM
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Originally Posted by spdrun View Post
Flight Data Recorder Rule Change

They went all-digital in the 1990s due to government requirements requiring more data to be recorded.
Ok...I remember that now. I forget what crash or crashes led them to do that.

I remember calls for more data .
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  #20  
Old 03-25-2015, 12:57 PM
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Originally Posted by spdrun View Post
Apparently, one of the data recorders is damaged and missing its memory card, the other has yielded no information. Interesting...

http://www.nytimes.com/2015/03/26/world/europe/germanwings-airbus-crash.html
And probably a good reason for Insidious' suggestion that communications and flight data automatically start transmitting when the $h!t hits the fan, whether triggered by some parameters or the pilots. Missing memory cards or hunting for the black box signal at the bottom of the ocean would become less crucial in the investigation.
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  #21  
Old 03-25-2015, 12:59 PM
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Originally Posted by SwampYankee View Post
And probably a good reason for Insidious' suggestion that communications and flight data automatically start transmitting when the !t hits the fan, whether triggered by some parameters or the pilots. Missing memory cards or hunting for the black box signal at the bottom of the ocean would become less crucial in the investigation.
Or can be triggered by a coded signal. i.e. ATC knew something was up with the plane deviating from normal altitude before the crash.
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  #22  
Old 03-25-2015, 01:21 PM
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has anyone read the AD I posted from EASA? It is a plausible situation
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  #23  
Old 03-25-2015, 01:29 PM
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Originally Posted by Txjake View Post
has anyone read the AD I posted from EASA? It is a plausible situation
Yep, plausible. And their solution seems to be "turn off two out of three computers and pray."

But why no distress call?
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  #24  
Old 03-25-2015, 01:46 PM
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Originally Posted by spdrun View Post
Yep, plausible. And their solution seems to be "turn off two out of three computers and pray."

But why no distress call?
Unless I'm missing something, and that's entirely possible, that's how I read that.
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  #25  
Old 03-25-2015, 02:08 PM
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Originally Posted by SwampYankee View Post
Unless I'm missing something, and that's entirely possible, that's how I read that.
They work that out in a simulator as a fix and FAA would have to buy off on it or the planes would be grounded if it couldn't be overcome.
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  #26  
Old 03-25-2015, 02:38 PM
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Originally Posted by spdrun View Post
Yep, plausible. And their solution seems to be "turn off two out of three computers and pray."

But why no distress call?
The scenario seems like what may be addressed in the AD. No distress call is disturbing. Pilots don't do that.
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  #27  
Old 03-25-2015, 02:47 PM
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Quote:
Originally Posted by Txjake View Post
The scenario seems like what may be addressed in the AD. No distress call is disturbing. Pilots don't do that.
Check this out:

Quote:
The anonymous report on the pilots forum initially appeared on the Aviation Herald forum and is now being widely discussed by pilots online.
Tony Newton has been a commercial pilot flying A320 aircraft for 20 years and is also a Civil Aviation Authority examiner.
Speaking to MailOnline, he said it is 'entirely possible and plausible' that the disaster was due to structural damage to the cockpit, possibly a crack in the windshield, as the unconfirmed report has suggested.
'If there was sudden structural failure, the reduction in pressure would cause all the gas in the body to expand,' he said.
'The pilots would have been in pain as their ears and guts burst and they would have been extremely disorientated.
'The procedure is to get their oxygen masks on as soon as possible as they would only have a few seconds of useful consciousness without it.
'Then they should have programmed the plane to descend to a random altitude, just to get it going down to where there is thicker air and it's easier to breathe.
'Later on, when things are under control, they should have taken the time to refine the figures so the plane levelled off at about 10,000 feet, where they could remain conscious and continue to fly.'
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  #28  
Old 03-25-2015, 03:08 PM
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I thought the process for pilots is Aviate, Navigate, then Communicate

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  #29  
Old 03-25-2015, 03:32 PM
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I thought the process for pilots is Aviate, Navigate, then Communicate

it is, but they are also trained to communicate quickly any situation that might result in loss of the aircraft
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  #30  
Old 03-25-2015, 08:11 PM
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I heard it mentioned that certain types of jet engine oil and hydraulic fluid turn into a neurotoxin when burnt, similar to nerve gasses. Is it possible that the crew was overcome with toxic fumes and thus unable to communicate, but were somehow able to put the aircraft in an emergency descent before passing out?

British pilots overcome by fumes | UK news | The Guardian
http://www.nydailynews.com/news/national/u-s-airways-plane-grounded-sick-crew-passengers-article-1.2036020
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