Originally Posted by
malabo
Looked like a reasonable auto into water, maybe a little more impact than desired that damaged the right float, causing the eventual rollover. Flat water, may have made it more difficult to judge the flare height and contributed to the hard impact.
No flare; high rate of descent on touch down. Ship submerges at least up to shoulder level on impact.
Despite reports that the ship landed on its side, or flipped over upon ditching, the videos in the OP show that it stayed upright (albeit half submerged) for a few seconds while its blades slowed considerably by contact with water.
I would argue that the blades had come to a complete stop before the helicopter then turned towards its starboard side.