JE
John,
Not sure where you got your info but it is incorrect. The main rotor blades have struck the boom in this instance and there is no damage to the tail rotor blades. The boom has been all-but severed at the main rotor blade tip contact point AND the beacon has been smashed also by this impact......tail rotor strike COULD NOT cause this damage.
That is not to say that the accident occurred because the stinger has contacted the ground during a heavy landing causing the sudden stoppage of the downwards travel of the tail BOOM section causing the rotor blades to strike the boom. There is no indication that the blades struck the drive shaft although the miss must have been messured in micro mm's.
The major point in question here is the decision to return the aircraft to YSBK under it's own steam!