A safety scare meant a Jetstar plane with 160 people on board had to return to Wellington shortly after takeoff today.
The inability to pressurise the cabin posed both a safety and comfort issue, a Jetstar spokesman said.
Crew realised the cabin was not gaining pressure soon after take off on the 7.35am Wellington to Auckland flight, while the plane was still at a low altitude.
It was turned around and landed at Wellington before 8am.
As opposed to a loss of cabin pressure - which involved oxygen masks dropping from the cabin roof - a failure to gain pressure was less dramatic.
The incident took one of Jetstar's nine New Zealand planes out of service while it got repaired.
Passengers were being put on other flights today.
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