Originally Posted by
Kulverstukas
With no communication and ADS-B signal stopped in air?
We don't know that ADS-B data stopped being sent, only that FlightRadar24 stopped receiving it, which isn't the same thing and may simply be a receiver range vs altitude issue.
Originally Posted by
fullforward
This was uncontrolable high speed plunge. This is for sure.
Hard to avoid that conclusion. After allowing for the fact that FR24 populates some data items that it hasn't picked up, what's left indicates that shortly before data was lost the aircraft was descending at 15-20,000 fpm and a relatively low groundspeed.