A U.S. aircraft owner-pilot has learned aerobatics and gotten into the airshow business as a performer. His aircraft doesn’t carry much fuel, which is fine for the aerobatic performances over the airport but requires frequent fuel stops en route to and from shows.
The airplane has two seats, and although the owner-pilot isn’t FAA-certified as a mechanic he does have some mechanical aptitude. He fabricates a fuel tank that fits into the other seat where he can secure it with the restraint harness and has a quick-disconnect fuel line, so he can pull the tank out when he arrives at the airshow site, fly his routine without it, then quickly re-install it for the flight home. He takes it up for a local flight test and it works fine.
University of Georgia
A breach of the FAR has indeed been committed by him in this instance. If you do not possess a mechanic’s certificate or a repairman’s certificate with the proper rating from the FAA, the only way you are allowed to undertake work connected to aviation is if you are supervised by another individual who does possess a valid mechanic’s certificate.