LAI
yes, I was thinking that sort of thing too.
my working theory though is this...normal approach to another go around and due to some reason an engine failed and the plane got too slow and rolled inverted.
fuel?
fuel starvation due to the above crossflow thing ( the fuel valve could be found open as I recall as electrical failure opens the valve...but folks its been awhile and I can't remember)
sucking a bird
flameout due to moisture runback if prop spinner de/anti ice selected on with large amount of ice on the spinner
so many things
I am surprised that this type has CVR and DFDR, but if they do have these boxes, we should know soon.