Public Docket Opened in Gaithersburg, Md., Crash
http://www.ntsb.gov/news/press-relea...R20160120.aspx
From the Ops Group Factual Report:
"Investigators found ice accretions up to 10 millimeters in thickness on the airplane’s nose, wing leading edges, and horizontal stabilizer. The weather condition at the time of this accident included: Temperature 0 degrees Celsius; Dew point -2 degrees Celsius; Cloud cover 5 to 7 oktas (5/8 to 7/8 cloud coverage), at 1,400 feet above aerodrome level; visibility 4,800 meters with mist. Flight data recorder plots from the interim report indicated that wing and stabilizer de-ice was not used during the landing approach."