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Forum: Tech Log

5th Jun 2011, 23:38

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

The BEA report notes that the RHS airspeed is not...

The BEA report notes that the RHS airspeed is not recorded on FDR. So even though we know that the LHS and ISIS speeds matched again shortly after 2:11 we cannot be sure that the RHS airspeed also...

Forum: Tech Log

3rd Jun 2011, 15:16

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

FE Hoppy: There's no reason to think the...

FE Hoppy:

There's no reason to think the climb didn't start shortly after the nose up input just after 05. A big weakness of the narrative format that the BEA adopted for this report is that it...

Forum: Tech Log

1st Jun 2011, 16:13

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

jcjeant did provide a link, see his post...

jcjeant did provide a link, see his post (http://www.pprune.org/tech-log/452836-af447-thread-no-3-a-101.html#post6487274).

This is the second BEA-attributed statement today, after the one in...

Forum: Tech Log

1st Jun 2011, 14:28

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

We are not told what, if anything, the new PF did...

We are not told what, if anything, the new PF did after the handover, but the strange thing is that this handover does not appear to have changed much, as vertical velocity at impact (41 seconds...

Forum: Tech Log

1st Jun 2011, 13:08

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

First, "Prendre ma place" can refer simply to the...

First, "Prendre ma place" can refer simply to the captain's physical position, ie his seat, not necessarily to his role.

Second, you forget that the captain was PNF. So even if the new arrival...

Forum: Tech Log

30th May 2011, 22:13

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

True -- once the rate of descent stabilized at...

True -- once the rate of descent stabilized at some -10000fpm. But shortly before that, they'd actually been climbing, so at some point there was a heck of a vertical acceleration, and for that...

Forum: Tech Log

29th May 2011, 22:02

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

Hmmm, no. If the AP kicked out because of...

Hmmm, no. If the AP kicked out because of unreliable airspeed, he was already in Alt law -- even though the PNF didn't verbally state this until 11 seconds later.

Forum: Tech Log

29th May 2011, 15:28

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

I think the value of this thread has been...

I think the value of this thread has been precisely in pointing out how little can be concluded from what BEA has so far published. Some have been eager to make the BEA report fit various theories,...

Forum: Tech Log

28th May 2011, 21:14

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

Careful. We have obviously been given a VERY...

Careful. We have obviously been given a VERY partial transcript of conversations in that cockpit. We don't KNOW that he never acknowledges.

Forum: Tech Log

28th May 2011, 21:01

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

Why do you say it didn't work? Right after the...

Why do you say it didn't work? Right after the part you highlight, it says: "The vertical speed, which had reached 7,000 ft/min, dropped to 700 ft/min". Seems to me (from the little we are told here)...

Forum: Tech Log

28th May 2011, 15:10

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

EVERY single post on that site seems to be by the...

EVERY single post on that site seems to be by the same, vitriolically anti-Airbus poster. Caveat emptor, I'd say.

Forum: Tech Log

28th May 2011, 13:26

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

I suggested this on the initial AF447 thread, and...

I suggested this on the initial AF447 thread, and didn't get much response, but I don't see why it would not work:

As long as you have a valid IAS, you systematically compare it to GS using GPS...

Forum: Tech Log

28th May 2011, 10:32

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

The speeds were invalid because of disagreements...

The speeds were invalid because of disagreements between the sources ("incohérence") from 2:10:05 to 2:10:51, which is indeed a little less than one minute.

They then became invalid again at...

Forum: Tech Log

27th May 2011, 18:04

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

2:12:21? No, not then. The report states...

2:12:21? No, not then.

The report states that about 15 seconds after 2:10:51, the ISIS speed measurement abruptly jumps to 185KT, at which point it is consistent with the other recorded speed (ie...

Forum: Tech Log

27th May 2011, 17:33

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

From the BEA report: about 15 sec after 2:10:51...

From the BEA report: about 15 sec after 2:10:51 (ie about 2:11:06), the two recorded speeds (LHS and ISIS) are once again the same, and remain the same for the remainder of the flight. To me, this...

Forum: Tech Log

27th May 2011, 14:00

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

There's a stall warning at 2:10:51, then the...

There's a stall warning at 2:10:51, then the report notes that the stall warning horn stopped at 2:11:40, the clear implication being that the horn was sounding throughout the intervening period. So...

Forum: Tech Log

27th May 2011, 13:34

Replies: 2,070

AF447 Thread No. 3

Views: 615,436

Posted By spagiola

My emphasis added. We do not know that the...

My emphasis added.

We do not know that the others didn't react, as the report does not tell us either way. The report does note, however, that the PF and PNF both did something a 2:13:28 (1 minute...

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