Normal air traffic operations have now resumed nationally, Airways New Zealand said on its website.
The fire alarm was set off by smoke from one of Airways' two Uninterrupted Power Supplies, sending the radar and communications system to back-up mode, it said.
"...a conservative approach to managing New Zealand’s airspace was taken, which included halting departures within New Zealand airspace," Airways said.
Airways is responsible for controlling all air movements across 30 million square km (11.6 million sq. miles) of airspace in New Zealand and over the Pacific.
© Reuters, aero.uk | 02/10/2019 08:56