Fatal helicopter crash: Investigators' 'thorough' process could take years 19 Jan, 2021 11:48 PM 3 minutes to read The wreckage of the helicopter is removed from Kēkerengū Beach. Photo / Anna Leask Anna Leask is a senior reporter for the New Zealand Heraldanna.leask@nzherald.co.nz@AnnaLeask The investigation into a helicopter crash that killed a North Canterbury couple and orphaned their young children may take up to two years to complete. Andrew Hamish Davidson, 60, and his wife Lin Chen, 39, died when their helicopter crashed into the beach at Kēkerengū north of Kaikoura on December 15. Their two children and another child survived the crash but were injured and pulled from the wreckage by locals who rushed to the scene.