Inspection Day: What to Expect when Using a DAR (homebuilt aircraft) - HomebuiltHELP Watch in HD on YouTube! Share on Facebook! Before flying a newly built experimental homebuilt aircraft, the builder must have his aircraft inspected by either the FAA or a DAR (Designated Airworthiness Representative ). Many times the FAA is too busy or unavailable to perform these inspections, so we must turn to a DAR to perform the service. In this video we interview a DAR who explains how a DAR functions in this process and what to expect during the inspection. Learn how to get started with your aircraft inspection and certification using a DAR.