Originally Posted by gums
The facts now present clear proof that one can stall the 'bus without going into a spin or having severe wing rock or buffet. Anyone disagree?
Affirmative on the stability part. As for buffet, there might have been some:
Originally Posted by BEA report #3
This modification of the behaviour in the load factor at the centre of gravity results in the
appearance of a high frequency component of an amplitude increasing to until about 0.1 g
peak-to-peak, and with a signature that is very different from a turbulence signature of
meteorological origin. Moreover, there is a noise on track 1 of the CVR, at about 2 h 10 min
55, which might be the impact of the microphone striking a wall, heard at a stable frequency.
Note: According to the simulation of the aircraft movements, at this time the turbulence observed in the
first seconds of climbing had stopped.
Additional analyses were conducted with Airbus to determine if this phenomenon could
correspond to buffeting. The difficulty with identifying this phenomenon lies in the fact that, on
the one hand, the concept of buffeting is defined as accelerations at the pilots’ seats and not
at the centre of gravity and that, on the other hand, no flight test has been conducted under
conditions that correspond exactly to those of the event (particularly in terms of Mach).
Note: Examination of flight test data revealed, based on the frequency and amplitude, that this
signature could in fact be that of buffeting. By drawing analogies with the flight tests, the amplitude of
0.1 g at the centre of gravity suggests that the amplitude of the buffeting at the pilot seat is high
(approximately 0.6 g peak to peak).