Regarding
post #3244 on this page which has a link to the Impact Graphic page; the graphic should be read in conjunction with a
revised rate of descent which was recalculated following a timely intervention by
HN39.
There will be some that reject the use of the ACARS message timings and the CPC Cabin Vertical Speed message in particular, but with little else to go on, and now that the aircraft is known to have crashed very close to its Last Known Position, the last ACARS message is relevant.
Reading the Impact Graphic posting (linked above), you will find reference to an earlier graphic which used half the velocities. In either case the vertical acceleration (ROD) at impact was high, as evidenced by the compact debris field. Arm 36g associated with the vertical stabilizer and rudder will probably have suffered the damage it did in either scenario.
I stand to be corrected.