On Wednesday, March 21, 2018 at 2:51:05 AM UTC-4, wrote:
Hello David

Thank you for information. Maybe I didn't write it clear, but we are not under FAA but under EASA supervision. I've started to communicate with our civil aviation authority how to easiest approve some STC (or different solution) from NZ or from Canada.

Martin

EASA-Transport Canada bilateral agreement https://www.easa.europa.eu/document-...ents/eu-canada .
Then download
TECHNICAL IMPLEMENTATION PROCEDURES FOR AIRWORTHINESS AND ENVIRONMENTAL CERTIFICATION Under The Agreement On Civil Aviation Safety Between The Government Of Canada And The European Union* Revision 18 September 2017

and look at page 26, transfer of an STC.