1.   A few seconds later, the cockpit voice recording picked up an airframe rattle, which would be expected with a wake encounter.

2.   However, the NTSB said the Airbus experienced two rattles consistent with a wake encounter.

3.   One question to be explored is whether the rattling episodes are the wake encounters or something else.

4.   Within eight seconds of the second wake encounter, the plane began banking hard with its left wing down.

5.   Within eight seconds of the second wake encounter, the plane began banking hard with its left wing down, and then dove into the ground.