From a friend...
in fact, with no other information, if you were to ask "what would losing an ETT at high speed cause", the immediate guess would be "pitch oscillations, followed by a violent roll"
which, apparently, is pretty much EXACTLY what happened
that little tab...a trim tab...is designed to deflect very slightly up or down to relieve pressure on the stick. That is to say, you're flying along fat dumb and happy, but the airplane requires just a tiny bit of pulling back on the stick to stay level
it wants to go nose down ever so slightly
if you adjust the "trim"...which moves the entire elevator..it's too much...airplane wants to climb
so...when you get home, you move that little trim tab...much smaller than the whole elevator...just enough that you can fly along hands off
grossly oversimplified, but that's the basic premise
since that tab is connected to the elevator...if it breaks and starts flapping around, it becomes a "big floopy tab" if you will...I mean, usually it only gets moved small fractions of an inch..like, 1/8 or 1/4" maybe
even worse, only the one on the one side went wonky...meaning only one side of the tail is trying to come up or down
so...the plane SUDDENLY jumps up..or down...and is now also trying to roll..violently...because it's like an aileron at this point, changing the angle of only one side or the other of the tail
all the reports say the airplane pitched up, rolled almost in a "snapping" motion to inverted, and then headed for the ground, and then "yanked" again quickly before hitting the ground
sudden pitch movements, violent roll. *shrug*