wozzo
I'd be pedantic and also note that the plane COULD have ascended a little in an updraft. Then I'd say the plane broke up somewhere between and including 37000' and sea level to satisfy the fussy folks.
It rather obviously broke up SOMEWHERE.
I'd also note the plethora of messages virtually minute by minute from 0210 to 0214 and nothing subsequently. Thus one can say the plane was (relatively) in control with things rapidly turning to slime through 0214 and probably broke up within two or at most three minutes.
That's not guaranteed - the chain of failures MIGHT have ended at 0214. But that pushes my "but coincidences like that don't happen" buttons.
JD-EE