CAA deputy director of general aviation Steve Moore told RNZ the review identified a number of areas which increased risks for operators.
"Things like commercial pressures, training - the role of the regulator. We'll pick the important ones with the industry and work on them to make sure the sector stays safe. I'm not saying it's unsafe, we'd just like it to be safer."
The managing director of Nelson-based global helicopter firm HNZ New Zealand, Denis Laird, told RNZ National the accident rate was unacceptable. He said it was linked to old-fashioned entrenched thinking.
"It's an unacceptable rate and there's no excuse for it. There's a lot of cultural, historical issues that exist in New Zealand's helicopter industry that are causal in this."
Laird stated that the centralisation of CAA services had not helped, as there were now fewer people around the country checking safety standards.
He told RNZ National the authority struggled to keep up with operators who were not complying with the rules, which, according to anecdote, happened all the time. He added that the industry was diverse, and New Zealand was hampered by regions that were difficult to cover.
"We've got the Department of Conservation which is a big user and [CAA] issue a lot of permits to operate in the parks, and they tend to have a very hands-off approach to that.
"Accidents are happening and yet the concessions aren't reviewed. It's completely unacceptable."