Nearly 200 Qantas passengers ended up in Melbourne instead of Santiago after a mid-flight mechanical issue forced their flight to turn back. Nearly 200 Qantas passengers ended up in Melbourne instead of Santiago after a mid-flight mechanical issue forced their flight to turn back. Credit: NewsWireNearly 200 Qantas passengers ended up in Melbourne instead of Santiago after a mid-flight mechanical issue forced their flight to turn back. Camera Icon Flight maps shows path of Qantas flight that had to turn around due to mechanical issues. Credit: SuppliedCamera Icon Qantas flight QF27 turned back after a mechanical issue developed about 4.5 hours into the journey.