What happened to the QF12 LAX-SYD leg? It's showing delayed 11.5 hours. Another A380 gone tech?
When I'd checked about five hours ago, it was displaying as punctual but you're correct, as it's been altered to depart LAX at 1000 hours on Tuesday 3 instead of 2230 hours on Monday evening. This will delay SYD arrival until 1805 hours on Wednesday rather than 0630, so 695 minutes late.
If there are spare seats on 'the 16' B789 to BNE or 'the 94' A388 to MEL (as hopefully there should be, as it's not school holidays in Oz, although it's peak holidays in USA), passengers with status may well be transferred to those flights. QF56 to BNE is also operating on Monday night, having departed LAX only 14 late at 2229 hours. Otherwise, a night in LAX. I assume flight and cabin crew may be the same for 'the 12' after sufficient mandated rest in LAX, but it can be intriguing how an airline knows the plane, if a failure, will be ready to go by the morning.
On Wednesday 4, QF11, QF7 and QF1 are all at this stage showing as one time ex SYD. QF11 is still showing as an A388: sometimes when there are delays it can be altered to a B744.
VH-OQF and VH-OQK, as discussed elsewhere on AFF are in either AUH or DRS undergoing maintenance or refurbishment, leaving 10 available QF A388s, With the timetable requiring all 10 most days. It would normally be surprising therefore that one out of SYD tomorrow hasn't been cancelled or altered to a B744. QF35 (MEL - SIN) tomorrow is showing as the usual A388 as is QF93, the MEL - LAX.
However, QF7/QF8 do not usually operate on Tuesdays, so after arriving 103 minutes late at 0653 hours in SYD on QF8 on Tuesday 3, A388 VH-OQD is the "spare" overnighting in Sydney that will enable three A388 flights ex SYD (and two ex MEL) to hopefully all operate punctually on Wednesday 4.
AFFer Flyerqf (AKA 'the oracle') is the world expert on these changes so he may provide further information.