U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 14Chapter IPart 21Subpart H - Subpart H—Airworthiness Certificates
§ 21.171 - Applicability.
§ 21.173 - Eligibility.
§ 21.175 - Airworthiness certificates: classification.
§ 21.177 - Amendment or modification.
§ 21.179 - Transferability.
§ 21.181 - Duration.
§ 21.182 - Aircraft identification.
§ 21.183 - Issue of standard airworthiness certificates for normal, utility, acrobatic, commuter, and transport category aircraft; manned free balloons; and special classes of aircraft.
§ 21.184 - Issue of special airworthiness certificates for primary category aircraft.
§ 21.185 - Issue of airworthiness certificates for restricted category aircraft.
§ 21.187 - Issue of multiple airworthiness certification.
§ 21.189 - Issue of airworthiness certificate for limited category aircraft.
§ 21.190 - Issue of a special airworthiness certificate for a light-sport category aircraft.
§ 21.191 - Experimental certificates.
§ 21.193 - Experimental certificates: general.
§ 21.195 - Experimental certificates: Aircraft to be used for market surveys, sales demonstrations, and customer crew training.
§ 21.197 - Special flight permits.
§ 21.199 - Issue of special flight permits.
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