Just what is a “homebuilt” is now clearer. A long-awaited FAA advisory circular (AC-20-27G) outlines the approval basis for an aircraft to be registered in the experimental/amateur-built category. At issue was how much of the building is done by the builder, as opposed to prefabricated kit parts and/or work performed by professionals at a builder-assistance center. Though the provisions of the FAA document are advisory in nature and not mandatory, they are considered guidelines for designated airworthiness representatives and FAA inspectors, whose signature is required for an aircraft to be registered in the experimental/amateur-built category.
Homebuilt ‘51% Rule’ Clarified by FAA
Key Takeaways:
- The FAA has released Advisory Circular AC-20-27G to clarify the requirements for aircraft registration in the experimental/amateur-built category.
- The circular addresses how much of the aircraft's construction must be performed by the amateur builder, especially concerning prefabricated kits and professional assistance.
- Though advisory, these guidelines are intended for FAA representatives and inspectors who approve such aircraft for registration.
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