Singapore Airlines had grounded a second Airbus A380 aircraft for a fuel pump problem.
The incident on Monday night, delayed Sydney-bound passengers who had to switch to smaller planes.
In a statement issued today, airline spokesman Stephen Forshaw said the plane is now back in service.
He said the problem with the fuel pump was similar to a problem that grounded another A380 in February.
SIA is currently the only carrier operating the world's largest passenger jet.
Last week, it flew the plane for the first time on its Singapore-London route, after having first introduced the plane on regular Singapore-Sydney flights in October.
It currently operates three A380s and has another 16 on order.
Singapore Airlines will use its fourth A380, yet to be delivered, on its Singapore-Tokyo route from late May.
Source: MediaCorp Radio New Media Development