The last aircraft out of SYD Heavy was OJI I know I signed it out.
Would have thought all the 400s that went through Sydney would have had another major check by now.
QF 747-400s don't have rats or HMG with 4 IDG your aren't supposed to need them.
Everything should also switch over automatically when power fails flaps/slats would have kept going as they are Hydraulic and pneumatic.
