An incident involving two Air New Zealand pilots in the United States has been reported to the Civil Aviation Authority (CAA).
The CAA would not comment further, saying the airline was responsible for employment matters relating to its staff, ''and CAA cannot comment on those matters".
The aviation watchdog says it considers all information brought to its attention, "and determine whether any regulatory action is required".
The statement by CAA stems from a public post in which allegations are made about an altercation between two pilots on a flight to San Francisco earlier this month.
Air New Zealand refused to comment when details of the public post was put to them, telling RNZ: "We don't have anything to add on this one."
The post alleges "a heated verbal disagreement erupted in the cockpit" which became a physical altercation between the pilots at their hotel in San Francisco.
Passengers reported flight disruptions as a result, with flight departures from San Francisco to Auckland on September 6 and 7 cancelled.
According to the online post - which was put to Air New Zealand - passengers were told that the pilot scheduled to operate their flight was no longer able to operate the service.
"To get you on your way, we have arranged a replacement pilot, who is on their way to operate your flight to Auckland. Before they can do so, they are required to complete their mandatory minimum rest period.''
The Airline Pilots Association told RNZ it was under instruction to refer inquiries to Air New Zealand.
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