1. if you know your aircraft and it's "normal" behaviour you should realize that at 8° nose down something is WRONG. you should know some pitch & power settings and what speed to expect.
you should know, that at -8° pitch the IAS of 40 can't be, at least not for more than 10 secs. especially not, when the throttles are set to LOUD.
i didn't invent flying, i'm not perfect (only 99%
) but i have to say, those guys did a pretty poor job.
everything that happend afterwards could have been prevented.
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2. don't know about airbus unreliable airspeed CL, but on boeing, it's recall items
AIRPLANE ATTITUDE/THRUST.......ADJUST
PROBE HEAT...............................CHECK ON
MACH/AIRSPEED INDICATOR.......CROSS CHECK
notice pitch & power comes first, systems later.