There is no such thing as a "bad apple". The "other guy" is us, on any one day.
- wise words. It always seemed a little 'pansy' to check DME against GP intercept when you just KNEW the GP was going to be 'good', didn't you, and then there was always the OM check, wasn't there............................................
Maybe the airport DME was u/s, GP u/s whatever, but as said, with all the 'kit', including a WTFAI map in front of us..........................???? Would this a/c have TAWS with a complete database? That should have started shouting as they penetrated the terrain floor. Perhaps that is why they went round, although I would have thought the TF was well before 530'ATE at 11 miles?
The dangerous one is a GP fail 'on the slope' - there is a big clue if it is actually u/s earlier - the GP needle is 'centered' from or before LOC intercept.