It was indeed a brand new A330-200 so most likely VH-EBH.
Central tank leak rather than centre wing tank is more correct I guess.
One wonders what would have happened if the leak was not found, and why it was not before departure on QF123 ex SYD.
The 300 series was doing Mumbai, but via DRW outbound and nonstop return due to range limitations.
The 200 series used by JQ could not be converted due to floor loading limits not allowing the fitment of Skybeds in J class. The new equipment was purpose ordered with higher floor load capability.
Best all
EWL