3.1 This practice provides designers and manufacturers of engines for light sport aircraft design references and criteria to use in designing and manufacturing engines.

3.2 Declaration of compliance is based on testing and documentation during the design and testing or flight testing of the engine type by the manufacturer or under the manufacturers’ guidance.

3.3 With no further showing to this practice, manufacturers may claim compliance to this practice for engines or engine components, or both, that are:

3.3.1 Compliant with FAA 14 CFR Part 33 or EASA CS-E, or both.

3.3.2 Variants of these those specified in 3.3.1 from the same manufacturer, provided that:

3.3.2.1 The general configuration and principles of design and construction of the original are unchanged for the variant.

3.3.2.2 The assumptions, analyses, and testing of the original remain valid for the variant.

1.1 This practice covers minimum requirements for the design and manufacture of reciprocating engines for light sport aircraft.

1.2 Units—The values given in this standard are in SI units and are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound (or other) units that are provided for information only and are not considered standard. The values stated in each system may not be exact equivalents.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.