"This UPS accident involves an instrument approach procedure with complex technical conditions and limitations."
I'm not so sure.
To me, the NTSB briefings so far suggest a black hole illusion which seems to have resulted in CFIT. If so, it's not the first time and unlikely to be the last. So the mystery is in how this was set up?
It's extremely sad to lose assets both human and machine this way.
My sincerest sympathies go out to the entire UPS operation.
Willie