Couple of missing items here, mostly regarding UNSHROUDED rotors.
A common propeller must meet an overspeed test demonstration, 141% of takeoff RPM IIRC. If a blade separates above that speed, it's in the "extremely unlikely" category, thus beyond certification intent. However experience shows that in a worst-case situation,
it can happen.
I'm sure the
GE36 and the like had to meet such an overspeed test if it were to be certified.