Ansett found a couple of problems with the 767's in 2000 & 2001, fixed them & self reported. The fleet was grounded by CASA - twice! QF seems to have a growing number of issues that are at least as serious as those, but has never had even one aircraft grounded by CASA.
What has changed? Is CASA a different beast these days? Does QF have some sort of control over them? Is there political interference? Or is the 'National Carrier' simply untouchable?