something in the pitch control system of that airplane broke and rendered it uncontrollable...THS jackscrew maybe? Tail strike repair?..
niether the crash site nor the data shown are consisent with an airframe drilling into the ground.
The profile looks rather like a phugoid oscillation.......
not in the timeframe from the data
Obviously bank angle isn't shown on FR24 but I can clearly see it on raw data analysis.
You can easily work it out. the data shows at one stage a 25 deg heading change in something like 2 seconds.
The wreckage looks to be consistent with a flat stall/spin scenario.
This is consistent with the failure of some- or all flight control surfaces during cruise flight, including failure of the hydraulics. This has occurred in the past as a result of bulkhead failures /depressurization.
So case closed ? No need for an investigation then ?