Recently Flight Structures Ltd approved a major design change for Wellington's Life Flight Trust, where a Jetstream 31 was converted for aero-medical use. This project which was completed in under two months, involved refitting the aircraft with new Flight Structures seats, designing and approving stretcher bases and certification of the back up battery system. The fit out was completed by Vincent Aviation.
You can also refer to the May/June 2012 issue of Vector Magazine, titled "Design Delegation Holders" where the CAA explain how delegation works, referencing this project.
For more information on the Life Flight Trust please refer to their website.
To see footage of the aircraft, including the unique paintwork created by Weta Workshops please follow the link to the 3News website.