Originally Posted by
His dudeness
To me it looks as if they just banked the little bugger hard in order to correct onto the LOC and either did not pull, thus the descent rate developed or the aircraft was full of clear ice and had an "high speed stall" when they banked it.
Indeed a combination of these factors could be an explanation.
The weather was deteriorating too. When an aircraft 10min before reported the ceiling at approx. 3500 it does not mean that it was the same for this aircraft. The shortly afterwards arriving SAR took place in heavy snowfall. I only mention this as far as outside reference is concerned.