But this is Deep Stall. I refer to first Stall Warn, as shown in the report.
AF447 did not enter a deep stall at 38,000 ft. It was a conventional stall. Deep stalls occur mainly on aircraft with rear mounted engines and a T-tail design. Aircraft that employ the canard design feature are prone to deep stalls if preventive measures are not included in the design. A-330s don't have a T-tail, rear mounted engines or canards and don't deep stall.