CFR›Title 14›Chapter I›Part 133 ContainsSubparts A–DCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 133—ROTORCRAFT EXTERNAL-LOAD OPERATIONS Subparts A Subpart A—Applicability Section 133.1 B Subpart B—Certification Rules Sections 133.11–133.27 C Subpart C—Operating Rules and Related Requirements Sections 133.31–133.39 D Subpart D—Airworthiness Requirements Sections 133.41–133.51 Authority49 U.S.C. 106(g), 40113, 44701-44702.SourceDocket 1529, 29 FR 603, Jan. 24, 1964, unless otherwise noted. Previous 129 Part 129—Operations: Foreign Air Carriers and Foreign Operators of U.S.-Registered Aircraft Engaged in Common Carriage Next 135 Part 135—Operating Requirements: Commuter and on Demand Operations and Rules Governing Persons on Board Such Aircraft