Engine
GY
My guess is that the engine you mentioned is about 80 to 100 meters pass the tail to the left of main debris field axis.
I can't place the other one. I looked again at the initial video clips shown in the media and there is something that could be an engine (but it might also be a piece of fuselage skin) in the area of the building at the corner of the perimeter fence, another 100 or so meters further forward and to the right of the field axis.
C-SAR