Originally Posted by promani
Looking at the graphs that the BEA has published in the latest report, I notice that at the time AF447 made the initial climb, the temperature had increased and the wind had not only increased, looks like off the scale, but changed direction ~180. Would this be a coincident, or am I talking the "proverbial"?
That's typical from UAS event. TAT probes are frozen also, and most of the time they are the first to be frozen (temp climb to zero C°, temp of ice inside probes). Wind speed and direction is derived from ADR data. When speed drops a lot, TAS is wrong, Wind speed is wrong (and out of boundaries) as it is derived from comparing TAS with Ground speed (GPS).
If no wind: before 490 TAS; after 150 TAS = 340 kt wind speed.
From DFDR, they have deduced a head wind of about 15 kt during the sequence.