A Qantas jet on its way to Shanghai from Sydney on Thursday turned back after a weather radar malfunction on board.
Qantas said flight QF129 with 278 passengers on board landed safely and the radar was inspected by engineers.
A replacement aircraft for the Airbus A330-300 was put
into action and it took off at around 7pm (AEDT) Thursday.
It's the latest in a series of incidents involving Qantas aircraft.
Last month, the crew of a Qantas jumbo was forced to rely on weather reports from an Air New Zealand aircraft when its own radar broke down.
In August, an oxygen tank exploded mid-air, ripping a hole in the plane's hull and forcing an emergency landing.
Last month, 44 people were injured when an Airbus suddenly plunged hundreds of metres over the West Australian coast.
- AAP