This is a level of complexity beyond my understanding. Having said that, the FAA is an inconsistent bureaucracy. An example I do understand is their rigid, even unreasonable, position on the...
The military simply cannot compete with the major airlines. Never have, never will.
KCRQ RNAV (GPS) Y Runway 24, not RNAV (RNP) Y Runway 24. :-)
This flight was doomed well prior to the start of the final approach segment because of grossly inept handing of the transition from the terminal phase of flight to the final approach phase.