Originally Posted by Silver Fox

If this had happened in Africa or Asia the conversation would be a whole lot different.

Hopefully the pilot is grounded and probably the ATC need to review some procedures too. If UAL1 had not piped up then I fear the outcome would have been an utter catastrophe, although ATC could probably say "I was just about to say go around anyway".

And if this was not solely a human problem but an avionics problem is claimed, then AC planes of this type should be grounded until they can be checked out. They should not be waiting for an inquiry to establish what the factors were at play here for obvious reasons.