Firefighters and their bosses are locked in a dispute over the safety of their engines amid claims one truck's pump failed during a recent callout.
Auckland firefighters are refusing to use the 11 modern Fraser-MAN fire trucks and say their colleagues were inside a burning house in Manurewa on Friday when one engine's pump failed.
The latest claims have rekindled a long-running dispute between the firefighters' union and Fire Service management, who insist the trucks are safe to use.
The Professional Firefighters Union (NZPFU) says its members have reported more than 300 faults since August 2015.
The Fire Service ordered 47 of the new MAN engines, with a total price tag of more than $20 million. They started entering service in early 2015.
Fire Service national operations manager Paul Turner concedes there have been issues with the engines in Auckland but says these have been addressed.
"Since their introduction in early 2015, numerous issues and faults have been identified with the appliance," Mr Turner says.
"The Fire Service has been making good progress on a range of required fixes, in association with the PFU [Professional Firefighters Union], local and international suppliers.
"We plan to implement stress testing of all the fixes in late February."
Fire Service Counties-Manukau area manager Larry Cocker says recent issues were due to a technical glitch. He insists the service is in no way compromised by the issue and there is no risk to the public.
But the PFU says claims the Auckland fire trucks are fixed is news to them.
Auckland branch Vice-President Boyd Raines told Newshub all 11 MAN fire appliances in the city were sitting in a repair yard in Otahuhu and no one was working on them.
He provided Newshub with a list of 350 reported faults since August 26, 2015 after the new fire appliances were introduced which included problems with doors, chassis and pumps, and says sometimes trucks simply failed to get out of the fire station.
He says it's lucky that no one had died as a result of the introduction of the new appliances.
In the meantime, firefighters in Auckland are now using Scania trucks which are up to 25 years old - vehicles which the union says are far more reliable.
Newshub.
