SAS=stall avoidance system..installed on all SA-226/227 aircraft..SAS2= a combination of a SAS and a Stability Augmentation System that was initially installed on the SA-227TT (merlinIII), (a similar system was installed on the Piper Cheyenne-2)..the SAS2 system was required for certain European authorities..SAS2 was standard in the SA-227BC the FAA/JAR part 23 certified SA-227..(Metro23)
If the aircraft in the accident is SA-226, then it is a "short-wing" Merlin/Metro, and take it from experience, has nasty wing drop when flown to a full aerodynamic stall...if the rudder was even slightly displaced one might find themselves inverted...The SA-227 in my experience..4K+hrs, exhibited relatively benign full stall characteristics, and no wing drop when the controls were pushed forward in a positive fashion to "unload" reduce the AOA..in any event, "push and roll" is the order of the day...