The accident report
The report was published early this morning. My own personal summary is that there was no technical failure; it was at high AUM and near forward CG. The rate of quickstop in these conditions (also noting a low noise down attitude in the hover - a result of fwd CG) would have needed lots and rapid aft cyclic which resulted in main disc contacting the boom.
Thoughts still with the family of the pilot and with the 4 surviving passengers.