Just speculation, but combining pilot's report of "we've lost all power" and "dead stick" plus the fact there was no fire equals no fuel. No hydraulics might explain no main landing gear.
That would be a thought however, earlier reports by the Asst. Fire Chief said there was a basement full of fuel in the home where the plane came to rest.
Also in earlier reports there was an electrical issue but nothing in the preliminary report address that situation.
Just not sure how you would have enough energy to make 2 unsuccessful approaches and do a go around for an attempted 3rd approach without some power coming from the turbines.
VFD