I've spent two decades on the ATR (all variants) and a TRE/TRI for a good period of that. I'm not saying it to beat my chest but to make some comments reagrding this tragic accident.
- The ATR 72 has 2 flap settings (15 & 30). Its not clear from the photos or video what setting they had at the time of the stall but it appears to be flaps 15 which for that stage of the flight it should have been 30.
- ATR has a shaker and a pusher, the pusher goes off well before CLmax and is extremely forcefull. If inhibited or switch off the shaker will still rattle your cage enough to make you carry out Stall Memo items as trained (effectively, Push, Wings Level, Power as required).
- Having tested the machine in real life without the shaker and pusher activate it will drop a wing if not in balance and aerodynamically stalled. If the aircraft was in the turn then its a real possibility. There is no pitch up tendancy, quite the opposite.
- I'm not drawing any conclusions apart from saying the video shows a very nose high ATR that stalls and drops a wing. What lead to the event is unknown and nothing anybody should be speculating.
My thoughts go out to everyone on this flight and the people they left behind. It's truly a tragic event.