'The stall warning sounded twice in a row. The recorded parameters show a sharp fall from about 275 kt to 60 kt in the speed displayed on the left primary flight display (PFD)'
What does 'twice in a row' mean - why not continuously ? Doesn't the warning continue until the a/c is unstalled (or switched off at <60kts, though why it isn't latched if V is initially valid eludes me).