Air New Zealand will set up a special team to fly overseas to deal with large scale passenger disruptions following a review into the stranding of 227 passengers in Hawaii last week.
The airline was also continuing another inquiry into claims that pilots and cabin crew in Honolulu had been drinking and would not have been available for duty at one point, even if the aircraft had been airworthy.
Following the initial investigation into the stranding, the airline's chief executive Christopher Luxon said it would invest in a new communication system to provide better contact with affected passengers.
The investigation found the root cause of the disruption was an engineering issue which had previously been identified as a faulty warning light on a Boeing 767.
"I want to apologise again for the way our management of this situation let you down. While engineering disruptions are unfortunately a fact of life from time to time in the aviation industry, the situation should have been better managed on many levels and some valuable lessons have been learned," Mr Luxon said in a letter to passengers.