Comments on: Air France 447 http://project7alpha.com/2009/06/france/ American Airlines in Burma 1942 Mon, 26 Jul 2010 00:47:13 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Chip http://project7alpha.com/2009/06/france/comment-page-1/#comment-179 Chip Sun, 07 Jun 2009 20:01:36 +0000 http://www.project7alpha.com/?p=478#comment-179 Rod; See my latest post. The ISIS system is seperate, it deepens the mistery. Rod;
See my latest post. The ISIS system is seperate, it deepens the mistery.

]]> By: Rick http://project7alpha.com/2009/06/france/comment-page-1/#comment-178 Rick Sat, 06 Jun 2009 16:30:18 +0000 http://www.project7alpha.com/?p=478#comment-178 I'm reading this morning the AD to replace pitot tubes was issued before this crash, and that this particular airplane had not yet complied with the AD. That sheds a lot of light on this...there was a known defect in the pitot tubes, probably the heating system. I’m reading this morning the AD to replace pitot tubes was issued before this crash, and that this particular airplane had not yet complied with the AD. That sheds a lot of light on this…there was a known defect in the pitot tubes, probably the heating system.

]]> By: Rod http://project7alpha.com/2009/06/france/comment-page-1/#comment-177 Rod Sat, 06 Jun 2009 14:22:34 +0000 http://www.project7alpha.com/?p=478#comment-177 My question was whether standby instruments in the fly-by-wire system aren't INDEPENDENT of computers, precisely as a means of keeping an analogue alternative for when the digital system packs up. (Obviously, if all pitot tubes are iced up, no complete info will be available from any source.) My question was whether standby instruments in the fly-by-wire system aren’t INDEPENDENT of computers, precisely as a means of keeping an analogue alternative for when the digital system packs up. (Obviously, if all pitot tubes are iced up, no complete info will be available from any source.)

]]> By: Chip http://project7alpha.com/2009/06/france/comment-page-1/#comment-176 Chip Sat, 06 Jun 2009 12:11:44 +0000 http://www.project7alpha.com/?p=478#comment-176 Rod; As Rick points out there is a bulletin to replace pitot tubes, because of multiple airspeeds being fed to computers. Rick; It seems to me they are jumping to conclusions, like the bulletin to pilots to maintain airspeed. That one seems a bit premature to say the least. Rod;
As Rick points out there is a bulletin to replace pitot tubes, because of multiple airspeeds being fed to computers.

Rick;
It seems to me they are jumping to conclusions, like the bulletin to pilots to maintain airspeed. That one seems a bit premature to say the least.

]]> By: Rick http://project7alpha.com/2009/06/france/comment-page-1/#comment-175 Rick Fri, 05 Jun 2009 23:31:20 +0000 http://www.project7alpha.com/?p=478#comment-175 Now we're seeing Airbus issue a directive to replace all A330 pitot tubes, which they think could have iced up and given a faulty airspeed indication. I wonder how they could have jumped to that conclusion and taken such a drastic step as that. Glad they're doing it, but they must know something, wouldn't one think? Now we’re seeing Airbus issue a directive to replace all A330 pitot tubes, which they think could have iced up and given a faulty airspeed indication. I wonder how they could have jumped to that conclusion and taken such a drastic step as that. Glad they’re doing it, but they must know something, wouldn’t one think?

]]> By: Rick http://project7alpha.com/2009/06/france/comment-page-1/#comment-174 Rick Fri, 05 Jun 2009 21:53:56 +0000 http://www.project7alpha.com/?p=478#comment-174 Two excellent posts & observations in one day! Would daylight conditions have been any better for build-up avoidance? Is the weather radar enough that there is little if any difference? This incident increases my aversion to night flying...as have several incidents in the recent past, including the dumb mistake in Lexington, KY a couple of years ago. Rick Two excellent posts & observations in one day! Would daylight conditions have been any better for build-up avoidance? Is the weather radar enough that there is little if any difference? This incident increases my aversion to night flying…as have several incidents in the recent past, including the dumb mistake in Lexington, KY a couple of years ago.
Rick

]]> By: Rod Miller http://project7alpha.com/2009/06/france/comment-page-1/#comment-173 Rod Miller Fri, 05 Jun 2009 19:20:50 +0000 http://www.project7alpha.com/?p=478#comment-173 Here's my question (pardon my ignorance): If I understand correctly, the standby instruments were in some way dependent on computers. Doesn't this defy the whole point of standby instruments, i.e. that when all the electronics pack it in, you at least have airspeed, altitude and attitude indicator? Barring a problem with pitot or static port (like that unlucky 757 in Lima), how could the grew be left with absolutely no instruments at all, which is what, I gather from a number of sources, is being suggested happened on AF447? Here’s my question (pardon my ignorance):

If I understand correctly, the standby instruments were in some way dependent on computers. Doesn’t this defy the whole point of standby instruments, i.e. that when all the electronics pack it in, you at least have airspeed, altitude and attitude indicator?

Barring a problem with pitot or static port (like that unlucky 757 in Lima), how could the grew be left with absolutely no instruments at all, which is what, I gather from a number of sources, is being suggested happened on AF447?

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