Although some coverage states the plane's engine had caught on fire, Qantas denies that claim.
Qantas said engineers are inspecting the aircraft.
Engine trouble on a Qantas Airbus A380 caused the plane to turn around and return to LAX mid-flight.
Flight QF94 suffered "an issue" with one of its four engines, Qantas confirmed in a statement this morning.
'The plane was then turned back and landed safely but multiple fire trucks were lining the runway when we landed, ' the passenger said.
'Friday night's QF94 A380 service from Los Angeles to Melbourne turned back to LA because of an issue with one of the aircraft's four engines, ' Mr Woodward said.More news: Northwestern takes NCAA women's golf lead in rain and cold
The Australian Transport Safety Bureau is gathering information tail before deciding whether an investigation was warranted.
Passenger Darren Sudgen, told News Limited he heard a loud noise as the engine failed.
Passengers on board have been put on a replacement flight which is due in Melbourne at 10:00pm.
Others took to social media posting photos of the engines of the plane, while one angry passenger tweeted his anger over the situation, writing that he was forced to sleep at LAX airport.
He said passengers were asked to spend the night inside LAX while they awaiting the next available flight.