Mohdawang
Its up to any airline to supervise maintenance regardless of where it's carried out,inhouse or MRO.You should scrutinise work carried out by an unfamiliar mechanic on your car more carefully right ?
Ergo,the responsibility rests entirely with Qantas for all maintenance.
Don't get too upset by the media quoting unnamed people as saying MAS is to blame.Newspapers need headlines to sell more papers,the more insulting to a large group of people,the better in their eyes
A common attitude amongst newspaper editors is :
" Never let the truth get in the way of a good story"
From first hand experience