Went to Malaysia Airlines site and looked up the flight to LAX.
It's a Boeing 777-200.


Ummm... I wouldn't expect any less competent intelligence than to use the most trusty-reliable work-horses in the fleet with greater capabilities on one primary routes on one of your busier travel days of the week...?
I'm actually a very big fan on Malaysia Air as a commercial airlines company, their entire fleet is I think ~ 3/4-2/3 Boeings

AND (by coincidence, I think not

) they have one of the highest standards (and record) for maintenance and safety quality in the world today still, if I recall. They also, previously, had the class/style/swager to operate DC-3s and Super Connies (and I think they still do operate DC-3s in Malaysia).
They're also ordering I think ~50 new boeings if I remember the recent news reels.