To those who say that this incident is a non event, I beg to differ.
The holes in the Swiss cheese almost lined up. The GPWS went off.
Now suppose that the GPWS had failed due to inadequate maintenance, or the crew were busy dealing with some other issue caused by inadequate maintenance and ignored the warning?
Qantas obviously does not subscribe to the "holes in the cheese" theory of accident prevention because they have not done their utmost to close all the holes.