Air New Zealand on Wednesday criticized French aviation investigators for releasing an interim report into last year's A320 crash into the Mediterranean to media before it was shown to the victims' families.
The 50 page document was released in Paris early Wednesday morning NZ time.
Air New Zealand CEO Rob Fyfe said he planned to complain to the director of the investigation and to France's Ministry of Transport about the way the report was published, Radio Newstalk ZB reported on Wednesday.
The French crash investigation process was different from that of other jurisdictions and he believed it breached protocol, he said.
Fyfe said the airline had not been allowed to give any insight into the actions of the crew, such as carrying out maneuvers at low altitude, which the report suggested could have caused the crash.
Fyfe also said Air New Zealand's specialists had not been given access to the flight recorders' data.
In their report, investigators called for stricter oversight of maneuvers and training on such handover flights.
The interim report into the crash of an Air New Zealand Airbus A320 off the coast of France said a stall warning went off two minutes before the crash.
The aircraft was undergoing a test flight and the report said a testing maneuver was carried out at too low a speed.
The plane went down in the sea as it was coming in to land at Perpignan, France, on Nov. 27.
All seven people onboard were killed, including two Germans and five New Zealanders.
Two minutes before the crash, the plane's speed decreased by 37 knots at a height of around 900 meters above sea level.
The full report may take one to two years.