1. sorry for my english;
2. the floats have not been infloated because they have no time to realize what was happening. Everything too fast.
3. the pilots evacuated the helicopter by the pilot side window that had been broken by the pilot's harm during the impact
4. the emergency exit lever did not work. Yesterday Agusta released a technical prescription asking to check structural interferences between the door and the heli structure. In other words the structure "covers" the hinges and the door trut is not able to exit.