QANTAS Boeing 737-838 VH-VZR overnighted at Adelaide after arriving as QF665 from Brisbane yesterday evening, however its first scheduled flight this morning as QF674 Adelaide – Melbourne was cancelled due to a technical issue. The aircraft was able to position Adelaide – Melbourne as QF6113 late in the afternoon then returned to service operating QF458 Melbourne – Sydney. The aircraft then positioned Sydney – Melbourne as QF6123.