According to the following news interviews, the aircraft was torn apart by the ocean swell/s. See:
http://www.hawaiinewsnow.com/story/24265511/ntsb-gets-first-look-at-salvaged-airplane
Also not the aerial video which shows the aitcraft location in relation to the island.
be sure to play the video. They talk about the enegine and show it. You may also want to paste some of those pictures elsewhere, where they will appear larger and easier to see.
Additionally,
""The wings were separate. The fuselage was separate. The engine was separate from rolling on the rocks in the swell," Patrick Ross said."
"The Cessna Grand Caravan sat aboard the salvage vessel Kahana at Pier 29 Thursday morning. Ross said sections of the plane were scattered across a 100-foot-long debris field. It took his crew about ten hours to float all the pieces to the surface."
http://www.hawaiinewsnow.com/story/24265511/ntsb-gets-first-look-at-salvaged-airplane