Part 1 - Definitions and Abbreviations
Part 11 - General Rulemaking Procedures
Part 21 - Certification Procedures for Aircraft and Related Products and Parts
Part 23 - Airworthiness Standards: Normal, Utility, Acrobatic, and Commuter Category Airplanes
Part 25 - Airworthiness Standards: Transport Category Airplanes
Part 27 - Airworthiness Standards: Normal Category Rotorcraft
Part 29 - Airworthiness Standards: Transport Category Rotorcraft
Part 31 - Airworthiness Standards: Manned Free Balloons
Part 33 - Airworthiness Standards: Aircraft Engines
Part 35 - Airworthiness Standards: Propellers
Part 36 - Noise Standards: Aircraft Type and Airworthiness Certification
Part 39 - Airworthiness Directives
Part 43 - Maintenance, Preventive Maintenance, Rebuilding and Alterations
Part 45 - Identification and Registration Markings
Part 91 - General Operating and Flight Rules
Part 119 - Certification: Air Carriers and Commercial Operators
Part 121 - Operating Requirements: Domestic, Flag and Supplemental Operations
Part 129 - Operations - Foreign Air Carriers and Foreign Operators of US-registered Aircraft Engaged in Common Carriage
Part 145 - Repair Stations
Part 147 - Aviation Maintenance Technician Schools