Originally Posted by
Less Hair
To be fair to Boeing: There is no point in now suddenly requiring the grandfathered MAX to be built like a new airplane in every detail. Sort the sensors, MCAS, the trim, the processor, the training and/or pod aerodynamics and that's it. Opening a can of worms will lead to nothing. If future grandfathering should be abandoned by the authorities let manufactures know about well in advance for the next types and programs.
Well this is not my center of expertise, but if the risk of rudder cables being cut by shrapnel due to modified engine position and increased piercing capability due to increased moment of inertia and particle size this may not simply be grandfathered.