1a Sound Asleep - it is all about the numbers. There are a greater number of "roller" units than there are GE, so, statically, the rollers should ****e themselves more often than the GE's if both engines have typical reliability numbers - which they would.
A question for the mass - why is it that anytime something goes wrong - it is "linked" to maintenance overseas?
Most of today's foreign carriers use MRO etc and "outsource" some maintenance functions - yet they don't seem to have the sam regular "episodes" Qantas has...
Or maybe it is because you just don't hear about it...Delta had two in-flight engine failures a few months ago (one had Leonardo Di Caprio on-board) yet, it hardly made the news here...perception management...
And for some other reason - people think that Australian Maintenance Engineers are the cream of the planet and are invincible. They're still humans and still susceptible to mistakes - which they make.