U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 14Chapter IPart 21Subpart K - Subpart K—Parts Manufacturer Approvals
View all text of Subpart K [§ 21.301 - § 21.320]
§ 21.313 - Duration.

A PMA is effective until surrendered, withdrawn, or the FAA otherwise terminates it.

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