Originally Posted by
vilas
Approach to stall? At FL370 if you yank the stick back the aircraft will be in region where it is not tested. That is why airbus forbids practicing deep stalls in Sim because there's no data available to make realistic simulation.
From the report, Bonin's second brisk command in Pitch was Nose Down. Halfway through stick travel to neutral, the STALLWARN activated. He did not create the first SW by "yanking stick back". That is an airborne myth.
Please see Winnerhofer's post of the Stall training video issued by the company.
No Nose Drop, just loss of altitude from level. How long into Stall does "deep" Stall occur? From your comment, untrained deep Stall with gentle unremarkable entry is without precedent, by design.
Unfamiliar? An unobtrusive and untrained passive entry to Stall might confuse anyone? It is without contradiction that Stall was rejected by crew.
Once in very high AoA, any Nose Down produces remarkable acceleration and negative g. Sufficient to cause reversal by pilot of ND command. The record shows this? Add to this the return of STALLSTALL, and recovery is foreclosed, demonstrably....