GLS:
I would draw a distinction (see my earlier post) between LTE and LTA, and the UH60 most certainly did not have LTE.
As for LTA, I think that most helicopters would experience it at such extreme DA's when attempting to operate the aircraft outside it's maximum performance envelope. I still do not know what happened in that accident, but it simply looks like they ran out of power (whether by low side failure or simply hitting the limiter). Losing main rotor RPM costs you exponentially more loss of lift from your tail rotor due to loss of tail rotor RPM (because of V is squared in the lift equation). Thus the tail rotor is no longer able to provide the lift you require even though you are at full pedal, and around you go - just like the UH60. Just like any single rotor helicopter at such extreme DA's with a main rotor that is bleeding off. No certification is required for helicopters to maintain tail rotor authority at extreme DA's with out of limits decayed RRPM.
The difference between these "modern" designs and say the UH-1H is that the poor old Huey runs out of left pedal at high DA's before you even get to the bleed. In fact I think there is a warning about this in the FM for DA's above (now I am stretching the memory) 4000 ft and weights above 8300 lbs (9500lbs is MGTOW - reduced from 10500 in the original design).
In other words, Nick is quite correct and the UH60 accident does not contradict him at all.