On 1 April 1978 the domestic airline NAC was absorbed into Air New Zealand, which used the NAC NZ prefix for domestic flight numbers and the Air New Zealand TE prefix for international flights until October 1990, when NZ became universal.
The domestic airline NAC was absorbed into Air New Zealand. This was on 1 April 1978. Air New Zealand used the NAC NZ prefix for domestic flight numbers until October 1990. Air New Zealand used the Air New Zealand TE prefix for international flights until October 1990. NZ became universal.