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Forum: Tech Log

11th Jun 2012, 20:30

Replies: 77

Humbling sim experience

Views: 19,180

Posted By HazelNuts39

Two A340 'level bust' incidents have been...

Two A340 'level bust' incidents have been discussed recently on this forum: TC-JDN on 2/10/2000 and F-GLZU on 22/07/2011. In both cases there was an overspeed warning but the overspeed protection was...

Forum: Tech Log

11th Jun 2012, 18:29

Replies: 77

Humbling sim experience

Views: 19,180

Posted By HazelNuts39

I am talking about the Mach buffet that AF447 was...

I am talking about the Mach buffet that AF447 was entering at 02:10:55 at M.67 that is shown on page 43 of Interim Report #3 and described in the associated text.

Forum: Tech Log

11th Jun 2012, 15:25

Replies: 77

Humbling sim experience

Views: 19,180

Posted By HazelNuts39

Altitude variations affect IAS via the static...

Altitude variations affect IAS via the static ports. "Turbulent air" as such does not.
Mach buffet is a violent high frequency shake of the aircraft that is very different from turbulence-induced...

Forum: Tech Log

11th Jun 2012, 10:53

Replies: 77

Humbling sim experience

Views: 19,180

Posted By HazelNuts39

AZR, If the drain of a single pitot is...

AZR,

If the drain of a single pitot is blocked, and the intake of same pitot almost at same instant, then the total pressure inside the pitot is 'frozen', no change to detect. Same for a second...

Forum: Tech Log

11th Jun 2012, 07:14

Replies: 77

Humbling sim experience

Views: 19,180

Posted By HazelNuts39

Perhaps you misread. Overspeed warning took...

Perhaps you misread. Overspeed warning took priority over A/P disconnect warning. There was no stall warning because the airplane remained in normal law.
It wouldn't cause disruption of pitot or...

Forum: Tech Log

11th Jun 2012, 07:00

Replies: 77

Humbling sim experience

Views: 19,180

Posted By HazelNuts39

In this case they don't have to freeze at the...

In this case they don't have to freeze at the same time, but they have to freeze in the same manner. If a pitot is blocked at the intake and at the drains simultaneously, you wouldn't notice anything...

Forum: Tech Log

9th Jun 2012, 08:57

Replies: 77

Humbling sim experience

Views: 19,180

Posted By HazelNuts39

The symptoms you describe indicate a frozen pitot...

The symptoms you describe indicate a frozen pitot with front end and drains blocked and the total pressure trapped inside. Did all indicators have the same symptoms?

... but this doesn't fit:

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