Rotor Strike
I wonder if the cause of the low RRPM horn coming on was in fact the reported "gust of wind". I do not see how that decays your RRPM.
But earlier in the report it was mentioned hat the pilot had changed 6 of the 8 spark plugs to cure "an ignition problem".
I wonder if the supposed ignition problem was in fact a sticking exhaust valve, which I have experienced a number of times with R22s.
RRPM and airspeed are lost, and the heli shakes like a dog shi**ing razor blades. Just like an "ignition problem".
As for woman being struckas the heli descended: there were various people wandering about, after the pilot lost sped and height, perhaps she was just at the wrong place at the wrong time.
thekite