In 2019, the Transport Accident Investigation Commission (TAIC) found there had been a slew of failings by the authority before the tragedy.
Civil Aviation Authority (CAA) deputy chief executive of aviation safety David Harrison told the Christchurch District Court the authority now was completely different to how it was in 2015.
"With the benefit of the training we conduct, with the benefit of the changes in the structure and in complement with the introduction of safety management systems, the way we interact with that is significantly more effective than it was," he said.
After the crash, the authority admitted it had just two inspectors monitoring operators and said its oversight should have been better.
Harrison said the team responsible for certifications, particularly for helicopter operations, has now been boosted to seven, made up of six inspectors.
An additional person acted as a flight inspector and was responsible for helicopter standards, he said.
Harrison said at the time of the crash, the authority largely relied on compliance-based systems - a one-size-fits-all approach that often missed risks some operators faced.
He said the CAA had since moved to an individualised, risk-based system to check operators were up to scratch.
Harrison said the authority now conducted more unscheduled checks on operators but admitted they were often forewarned.
The coroner's inquest is set down until Friday.
