ManaAdaSystem: what does that incident have to do with this one? (Thanks for the link, that was an interesting read).
SQ, 777, OK, but ... what else is in common? No Fire. (And apparently, no damage to the aircraft).
This thread and this incident has to do with a fire involving an aircraft on the ground, and before that a malfunction that the crew determined was important enough that they not proceed to destination but instead return to base.
Absent new information from SQ or investigators, this thread is at risk of becoming an SQ or 777 catch all.
I did a quick search and did not find any new info released by investigators: did anyone come across new information?