Lack of action by the pilots is what's really impressive. They lost almost 30kts in a few minutes, had cruise speed low, degraded performance and increase speed alerts, yet they never took any action. At some point, FO said "a lot of ice", but still no action.

There's a simulation made by cenipa recreating the flight, and the right propeller's pitch increased from 82 to 100 during the right turn, then the aircraft rolls to the left, and the left propeller also goes to 100, and things go south from there. Not sure if related to the abnormal roll through