Somatogravic Illusions are not really connected to helicopter accidents-although they might appear, their numbers are neglectable, like 212man stated, they are more likely to occur at higher speeds.
I canīt stop to get back to my initial thoughts when reading about those accidents....lack of training and/or poor airmanship...
I am saying this without having any information on this crash-but again my experience in 25 years flying helicopter (and as an examiner) shows that there is a huge difference in quality and training within EASA countries....
E.g. Germany is VERY strict in their policies, and they hardly allow any deviation, resulting in pilots with thousands of hours experience on one type having to do a complete type rating course again only because their rating has expired a few days too long...while in other countries (not saying which), a "deviation letter" is created, and a waiver is produced, so the same pilot can now get away with only a checkflight...
(I saw exactly this-a pilot trying to renew his rating in Germany which he rejected as being too expensive....then a few weeks later, doing a checkride in a south eastern country, and got the rating back....not saying this pilot was not qualified; just saying that there are huge differences).
Flying is expensive-and flying helicopters is even more expensive; unfortunately the CAAs in Europe are Commited Against Aviation-they do their best to make flying as hard as possible, where they should try to make it as cheap and easy as possible, so pilots can receive the necessary training...
Just my2ct