A Qantas plane travelling from Los Angeles to Sydney was forced to tail an Air New Zealand flight after discovering its weather radar was faulty.
It is the latest in a series of in-flight problems for Australia's national carrier.
The Qantas 747 carrying 300 passengers was a few hours into its flight when it experienced problems with its weather radar.
It was dark at the time and, according to one passenger, the pilot announced that he was flying blind, but then he gave assurances that their was an Air New Zealand flight up ahead, which could help guide them home.
For the remainder of the 12-hour journey the Air New Zealand jet provided information about the weather from its own system.
A spokeswoman for Qantas said the passengers were never in any danger.
The plane landed in Auckland and then resumed its journey to Sydney, arriving about four hours late.