Originally Posted by
Thomas coupling
...
LTE on the other hand is a phenomenon where many helos 'may' suffer, simply because the aircraft ends up in a situation where even the beefy/big TR blades simply can't compensate for the massive increase in the 'big green arrow' and the TR "breaks away" from controlled flight. Obviously this is an aerodynamic phenomenon as opposed to LTA which is a design problem.
...
Its simple. Design choice/compromise causes insufficient TR authority (LTA) which leads to higher susceptibility to LTE. A quick search of the NTSB database reveals that only 2 production helicopters are truly affected.