QF7 SYD - Dallas was cancelled yesterday, so they don’t have an airframe there to operate the return QF8 Dallas - SYD which was airborne 45 mins ago using the QF21 frame (VH-ZNJ). Now there is no airframe for QF22…QF22 is cancelled tonight. Wonder what the issue is given that they cancelled it at the very least while QF21 was in the air if not earlier.