CAAD
Sorry, lomapaseo, but the GE90 did not meet the FAR33 blade off regulation. It enjoyed the use of a Special Condition to allow separation away from the top root seration.
No other engine enjoyed this alleviation.
Yes I am aware of what it demonstrated. Your words are slighty more correct.
Tis true that it was certified by testing under a Special Condition
of equivalency under part 33
In the end it had to show that it could be safely shut down after the release of the highest energy blade (typically but not necessarily a fan blade) released at its inner-most retention. But like an integral bladed rotor (blisk) the argument is what is the inner-most retention. GE argued that the typical disk-blade root area was to be controlled to the same standards as the disk (prime reliable) thus the inner-most portion of the blade that was exposed to similar hazards as RR & PW blades was the root airfoil.
So at least we may agree that after their redesign following their first test they have now demonstrated an equivalent level of safety?