I say again.......the right engine fan blades are plainly visible and still intact. This means the engine was not delivering power when the aircraft and both nacelles hit the ground. Even at idle power one would expect to see the blades stripped by the sudden deformation of the nacelle, such as is plainly evident in the left engine. This suggests the engine may have run down between 600 feet and impact.
Or they pulled the fire handles once over the road?