Video shared on social media showed what appeared to be the ATR-made plane spinning out of control as it plunged down behind a cluster of trees near houses, followed by a large plume of black smoke. The video of the mid-afternoon crash also appeared to show clear weather, though the forecast for the area called for light rainfall and winds of just 10 km per hour (6 mph). City officials at Valinhos, near Vinhedo, said there were no survivors and only one home in the local condominium complex had been damaged while none of the residents were hurt.
The Roselawn crash changed a lot of things for the ATR. No holding with flaps in icing conditions, increased speeds while in icing, etc. Unfortunately in order to comply with those procedures, you have to know you’re in icing conditions. There are icing probes in each pilot’s line of sight on the ATR, so it’s usually pretty obvious when ice is accumulating, but mistakes happen.
It’s possible that they’ve added more modern ice detection systems on the ATR, but the scope of my knowledge is limited in that department.