AF 447 Thread No. 9

[Lyman]

Clandestino

Here: "The rapid reduction in speed was accompanied by an increase in the angle of attack. The lift ceiling, at the Mach at which the aeroplane was flying at that time, was broken a few seconds after breaking through the propulsion ceiling. Due to its momentum,the aeroplane continued to climb: the aeroplane’s kinetic energy was converted into potential energy until the point was reached when the aeroplane unavoidably started to descend.

Here is BEA definition of the depart. Do you see any reference to STALL? The aircraft has climbed after the lift ceiling was passed, it was converting energy to altitude without benefit of aerodynamic lift, IOW, Ballistic. There was no drastic increases in drag, in fact drag was decreasing, due to the lessening of velocity.

Neither was there Stall Buffet sufficient to announce STALL onset. And the Nose remained UP.

These two markers are required by the certifying authority to allow the 330 a waiver for additional STALL warning. Stall is demonstrably available in ALTERNATE LAW, the 330 is no different than any other aircraft in this regard, and yet the requirement was waived? STALL WARN is dependent on Mach plus AoA so the certificate requires the 330 to warn always before BUFFET. Mach is not available in transient UAS, so the 330 is violating its certificate in this entry.

Other aircraft would shake in this regime, yet the Bus gets a pass...


HazelNuts39

Howdy.. You say: You seem to be making a distinction between "loss of airspeed information" and UAS. Do you mean they did not associate the UAS procedure with the UAS situation?

This is not even a nit pick... There is a profound difference between "loss of..."
And "Unreliable...."

Something I will repeat unto the door of no return, "We have lost the speeds."
That means, in it's most probable iteration, that the display of airspeed is.....GONE.

In the part of the CVR that does not exist in our reality, but is present in the reality of BEA and AIRBUS, there will be discussion between all three pilots of the loss of the visual data from the instrumentS.