Talking about full down auto-rotations to water with pop out floats. This video is from 2011 but no other information. You will have to search YouTube with "A119 autorotations" and select A119 as I do not have enough posts to include the "url".
I assume it was part of the Koala float certification. @ 7:00 it is cringe worthy.
However to the pilots credit he did not try to fly it away.
- Marcus