Last word from the photographer who was shooting with doors off and legs dangling.
it was an off-road race with immensely more powerful cars than rally cars, 36" wheels that are not entirely enclosed. The terrain is also much rougher and rockier than a rally race (I film both).
I felt the rocks hitting my legs while filming and I identified the crack on the window as it happened. I'm certain that the rotor blade underwent the inspection before the flight and I'm pretty sure that the crack would have been detected if it was there.
Mickjoebill