Here is the edited audio from the incident.
A real tragedy!
AirSpace - more than just hot air
Perception of a moderat to severe icing condition is largely individual. No messures are given, no numbers to go by, only your judgement as PIC. If you are in doubt, there is no doubt, AP of, fly by hand and get a feel of the aerodynamics acting on your aircraft. Keep good speed, don't change your configuration and fly out of the area of excessive ice acretion. Once in the clear, at altitude, check configuration changes and their effect. Considder reduced flap approach and landing, and check final approach configuration controlability at altitude before commencing approach and landing.
20 + years PIC on ATR aircraft in Scandinavia (plenty of icing conditions)
Total 43 years in the air : )
Earlier photo of N200WQ from Liberty Int'l Airport.