PF made a slight retard to .80 mach. AIR, that was it from the pilots.
How did the a/c get sideways enough to award a STALLSTALL to PF upon his first stick? His first input was nowhere near "full aft stick" which has become the Urban Myth collective bleat. ACARS, WINDSHEAR? TCAS? There is leeways aplenty for any analysis of the Turb value that the investigator wants. The noise heard by the pilots was not RAIN, nor was it ICE CRYSTALS, or Hail. I think it was a hellish updraft of perhaps 10000fpm, sufficient to start the entire a/c UP at 500fpm in 1.5 seconds. It's on the graph. The aerodynamic noise of an airmass turnaround/shift of 70-90 degrees is......noisy. I think the a/c was on the verge of a Stall, and dropped to ALTERNATE to sustain the NORMALLAWSTALLIMPOSSIBLE meme.
notquite, but you get my drift?