Aero Dynamix Inc. (ADI) announced today that they have received STC# SA09894AC for the Night Vision Compatible Lighting Modifications on the Viking De Havilland DH-6-400 Twin Otter platform. “We are extremely proud to add another fixed wing certification to our list of accomplishments in order to support our customers’ needs and demonstrate our team’s expertise” said Everett Horst, ADI’s Sr. Manager Sales and Product Support.