Originally Posted by
Machinbird
There was an accident in 1981 involving a military EC-135 that bears some resemblance to this B763 accident.
EC-135 loss of control
Indeed there are some similarities. Other flights reported IMC conditions, so the onset and what is going on exactly might not immediately have been transparent to the Crew and some ensuing confusion could have delayed possible corrective actions.
That would definitely be one of the somewhat less alien scenarios in this otherwise rather mysterious accident. Although there would still be the question why the Trim ran away. Let's hope they find the boxes soon. Something like this would be rather easy to determine from FDR data.