Steady on chaps. Not to comment on the merits of your argument L2 (although I remain to be convinced), your accident report does not back up your thesis.
Climbing to a height of 250 feet and whilst turning downwind, the handling pilot, who was also the commander reduced power and raised the nose of the helicopter such that the airspeed reduced to zero and a rate of descent built up.
In other words it was pilot action which caused this crash, not inaction.