Hundreds of domestic air travellers had their flights delayed this morning after Air New Zealand's entire computer system failed.
A suspected power outage affected online bookings, call centre systems and airport check in systems, communications spokesman Mike Tod said.
The company had to resort to manual bookings and check-in procedures while IT staff worked to fix the problem.
Mr Tod said flights were delayed up to two hours but it was hoped to have the system up and running again by this afternoon.
