But aviation industry commentator Irene King said she understood an oil pressure seal had blown in the plane, causing fluid to drip out onto hot parts of the engine.
King cited “good sources”.
“I can see why the passengers were perturbed about what the heck is going on,” she said.
King said it was “rare” for oil pressure seals to blow, mainly because they were subject to regular checks to make sure they were not close to perishing.
Her account is similar to that of a passenger on board the flight, who told the Herald the “crew chief” had explained the cause of the incident as passengers were being shuttled from the plane to the terminal.
The oil pressure had apparently dropped, then the engine dumped the oil and it made contact with hot parts of the engine and ignited, the man said.
An Air NZ spokeswoman this afternoon said it was “not possible to confirm the cause of the incident without an investigation”.
“Until that is complete, any other causation claims are speculation,” she said.
The Transport Accident Investigation Commission today opened an inquiry into the incident.
Acting chief investigator of accidents Louise Cook said the reported circumstances were that the issue with the left engine of the ATR72-600 aircraft, registration ZK-MVL, occurred about 4.11pm on September 1.
Flames flare from the engine of an Air New Zealand plane as it makes an emergency landing at Wellington Airport. Photo / Lauren Crawford-Flett
The aircraft landed with a trail of thick smoke billowing behind after its engine caught fire on approach to Wellington Airport this afternoon.
Fire and Emergency were advised of an ATR aircraft engine fire in Wellington. Passengers disembarked and assembled nearby on a grass verge.
“The plane was on final approach at about 300 feet,” Cook said.
“It’s reported there was a low oil pressure caution, then an engine fault and engine fire warning. The pilot declared a mayday, landed safely and stopped on the runway.
“Airport emergency services attended promptly and passengers and crew were evacuated onto the runway, with no serious injuries reported.”
Cook has appointed an investigation team, who are at the scene today.
The Transport Accident Investigation Commission opens an inquiry when it believes the circumstances of an accident or incident have - or are likely to have - significant implications for transport safety, or when the inquiry may allow the Commission to make findings or recommendations to improve transport safety.
The Commission’s purpose is to improve transport safety by avoiding repeat accidents, rather than by ascribing blame.
A plane has had an emergency landing in Wellington this afternoon.
Photo / Romeo Wellington
Emergency services swarm the runway after an Air New Zealand plane made an emergency landing at Wellington Aiport this afternoon. Photo / Romeo Wellington
It comes after a June 17 drama when an aircraft made an emergency landing in Invercargill when flames were seen coming from its engine over Queenstown.
Members of the public reported seeing flames coming from an engine and heard loud bangs, as the Virgin Airlines VA148 flight to Melbourne ascended from the southern airport.
One witness who took footage of the incident wrote: “Sounded like it was coming apart over our house. One engine was throwing flames and sputtering out.”
Melissa Nightingale is a Wellington-based reporter who covers crime, justice and news in the capital. She joined the Herald in 2016 and has worked as a journalist for 10 years.
