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Forum: Tech Log

13th Feb 2015, 21:25

Replies: 1,677

AF 447 Thread No. 12

Views: 531,141

Posted By Gysbreght

Just guessing: Front InterTropical, aka ZIC or...

Just guessing: Front InterTropical, aka ZIC or ZCIT (Zone de Convergence interTropical) or in English: ITCZ (InterTropical Convergence Zone).

Forum: Tech Log

8th Feb 2015, 11:22

Replies: 1,677

AF 447 Thread No. 12

Views: 531,141

Posted By Gysbreght

Rio by another name

Only if you don't read the report.

Forum: Tech Log

10th Dec 2014, 13:12

Replies: 1,677

AF 447 Thread No. 12

Views: 531,141

Posted By Gysbreght

With all ADRs off, the stall warning threshold is...

With all ADRs off, the stall warning threshold is not adjusted for Mach. Therefore the green band will not keep the airplane out of natural stall warning (buffet) above FL250. Airbus does not...

Forum: Tech Log

15th Oct 2014, 08:51

Replies: 1,677

AF 447 Thread No. 12

Views: 531,141

Posted By Gysbreght

Does it have to be 'accurate'? As long as it...

Does it have to be 'accurate'? As long as it indicates to the pilot in a reasonably realistic manner that the airplane is stalled, and elicits the proper response from the trainee, it would perform...

Forum: Tech Log

14th Oct 2014, 13:55

Replies: 1,677

AF 447 Thread No. 12

Views: 531,141

Posted By Gysbreght

I must admit that I'm not expert on this, but I...

I must admit that I'm not expert on this, but I believe system failures are addressed in FAR/JAR 25.1309. The general principle is that there must be an inverse relationship between the probability...

Forum: Tech Log

14th Oct 2014, 09:19

Replies: 1,677

AF 447 Thread No. 12

Views: 531,141

Posted By Gysbreght

No, that is not correct. You have to distinguish...

No, that is not correct. You have to distinguish normal operation and operation with system failures. Alternate law is a rare failure condition which, by design, does not occur more often than once...

Forum: Tech Log

6th Aug 2014, 09:40

Replies: 1,677

AF 447 Thread No. 12

Views: 531,141

Posted By Gysbreght

Winnerhofer: Stall warning is set to occur...

Winnerhofer:

Stall warning is set to occur before natural (aerodynamic) buffet starts. The stall warning threshold is approximately 1 deg less than the buffet onset AoA. At 7 - 8 degrees the...

Forum: Tech Log

24th May 2014, 12:57

Replies: 1,677

AF 447 Thread No. 12

Views: 531,141

Posted By Gysbreght

At about 02:10:33.6 the PNF said: "According to...

At about 02:10:33.6 the PNF said: "According to all three you're going up, so go down". He could have been referring to the two PFD's and the standby instrument, or to attitude, altitude and V/S....

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