I get that anyone can have a bad day - and certainly from personal esperiemce - flying in a snow storm requires increased concentration. The news report states that witnesses heard the engines accelerating meaning the crew knew they were in trouble - but it may have been too late. And true both came up in fixed wing aircraft. So sweeping the wings forward is new.
I wish we had access to the official accident report - that would shed some light on this unfortunate accident. LTC Sweet left a wife and 2 young girls behind.
Steve.