A Wānaka helicopter company is facing two charges under the Health and Safety at Work Act over a crash that claimed three lives.
An interim report from transport investigators found evidence the chopper crashed in 2018 when a pair of over-trousers flew from a cabin and became caught in a tail rotor.
Pilot Nick Wallis and Department of Conservation workers Paul Hondelink and Scott Theobald all died.
Owners, the Alpine Group, were charged by the Civil Aviation Authority in the Queenstown District Court yesterday, for failing to comply with their duties.
The crash happened just three months after another which claimed the life of Nick Wallis' brother, Matt Wallis.
The case was next due to be heard in September.