why did entering the wrong coords cause a terrain alert?
Unless the EGPWS was solely using GPS data I wonder if it was a predictive warning, based on the corrupt position?
Edit to add, having just dug into the report:
"An EGPWS alert activated at approximately 600 ft during the initial approach at Melbourne,
seconds prior to the commencement of the go-around. An assessment of recorded parameters
indicated that, as with the EGPWS alert departing Sydney, this was also a spurious warning
associated with the aircraft’s incorrect position information."