An Australian airline flight from Auckland requested a priority landing at Sydney airport Wednesday after experiencing a fuel system problem.
The Qantas Boeing 737 landed safely and passengers disembarked without incident.
A spokesman for Qantas said the priority landing was requested because there was a problem with a fuel transfer valve.
Australia's national airline has had a series of problems in the past year.
Last month, a Perth-bound plane returned to Adelaide after smoke was detected in the cabin.
The incident happened just days after a cockpit fire caused by an electrical fault forced a Qantas Airbus jet bound for Sydney from Manila to make an unscheduled landing in the Australian city of Cairns.
Several other Qantas planes were forced to make emergency landings earlier this year. And there was a spate of accidents in 2010 caused by engine problems with Airbus jumbo jets.
Some information for this report was provided by AP and AFP.