Errors in cpies of the same device
Then reading the report I an struck again by the fault in identical systems without any known important diversification in either design or in manufacturing. Hence the root should be classified as a Common Cause Error.
The PF pulling on the stick seems to be a common reaction to a surprising Stall alarm. Compare with the pulling in AF447. Somewhere I read after the turboprop crash that this pulling surprisingly occurred in 80 % of tested pilots.