What is the certification basis used for the issuance of a type certificate for a Piper model PA18A-150 restricted aircraft?

The correct response is based on the historical regulatory framework for aircraft certification in the United States. The Piper PA18A-150 is a type of aircraft that falls under the classification of restricted category aircraft, which is typically associated with certain operations such as agricultural spraying or firefighting.

CAR 8.10(b) specifically addresses the certification requirements for restricted category aircraft. It outlines the parameters and safety standards that must be met for issuance of a type certificate in this category. This regulation ensures that aircraft intended for specialized use, like the PA18A-150, meet the necessary criteria to operate safely within their intended limitations.

The other regulatory options, while relevant to various aspects of civil aviation, do not pertain to the specific requirements for restricted category aircraft certification. For instance, CAR 3 covers airworthiness standards for normal category aircraft, CAR 4a relates to the certification of transports and large aircraft, and CAR 21 deals with the certification procedures for product design and production, which does not specifically encompass the criteria for restricted category aircraft like the PA18A-150. Thus, CAR 8.10(b) is the appropriate regulation because it directly aligns with the necessary certification basis for the aircraft in question.