Yesterday news, the pilot of the near disaster Qantas 747 was saying that the incident was due to the outsourcing of the 747s fleet to another maintenance facility and he specifically mentioned Malaysia. And if you mention Malaysia, there are no other facility that capable of maintaining a 747 except for Malaysia Airlines.
I don't understand how and where did this pilot got his facts when uttering his remarks.
What I can tell you is, MAS only do maintenance on their 737s and even that I'm pretty sure not all of their 737s were sent here and apart from the 737s, there're a few of their engineers currently employed on a contract basis here hence the 1500 workforce lay-off plan made by them.
As of now investigators believed that the possible cause of the incident was from the onboard oxygen bottle (read here).