Part 121 - OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS
- Subpart A - GENERAL (§§ 121.1 — 121.15)
- Subpart E - APPROVAL OF ROUTES: DOMESTIC AND FLAG OPERATIONS (§§ 121.91 — 121.107)
- Subpart F - APPROVAL OF AREAS AND ROUTES FOR SUPPLEMENTAL OPERATIONS (§§ 121.111 — 121.127)
- Subpart G - MANUAL REQUIREMENTS (§§ 121.131 — 121.141)
- Subpart H - AIRCRAFT REQUIREMENTS (§§ 121.151 — 121.163)
- Subpart I - AIRPLANE PERFORMANCE OPERATING LIMITATIONS (§§ 121.171 — 121.183)
- Subpart J - SPECIAL AIRWORTHINESS REQUIREMENTS (§§ 121.211 — 121.295)
- Subpart K - INSTRUMENT AND EQUIPMENT REQUIREMENTS (§§ 121.301 — 121.360)
- Subpart L - MAINTENANCE, PREVENTIVE MAINTENANCE, AND ALTERATIONS (§§ 121.361 — 121.374)
- Subpart M - AIRMAN AND CREWMEMBER REQUIREMENTS (§§ 121.381 — 121.397)
- Subpart N - TRAINING PROGRAM (§§ 121.400 — 121.429)
- Subpart O - CREWMEMBER QUALIFICATIONS (§§ 121.431 — 121.455-121.459)
- Subpart P - AIRCRAFT DISPATCHER QUALIFICATIONS AND DUTY TIME (§§ 121.461 — 121.467)
- Subpart Q - FLIGHT TIME LIMITATIONS AND REST REQUIREMENTS: DOMESTIC OPERATIONS (§§ 121.470 — 121.473)
- Subpart R - FLIGHT TIME LIMITATIONS: FLAG OPERATIONS (§§ 121.480 — 121.485)
- Subpart S - FLIGHT TIME LIMITATIONS: SUPPLEMENTAL OPERATIONS (§§ 121.500 — 121.509)
- Subpart T - FLIGHT OPERATIONS (§§ 121.531 — 121.590)
- Subpart U - DISPATCHING AND FLIGHT RELEASE RULES (§§ 121.591 — 121.667)
- Subpart V - RECORDS AND REPORTS (§§ 121.681 — 121.713)
- Subpart W - CREWMEMBER CERTIFICATE: INTERNATIONAL (§§ 121.721 — 121.723)
- Subpart X - EMERGENCY MEDICAL EQUIPMENT AND TRAINING (§§ 121.801 — 121.805)
- Subpart Y - ADVANCED QUALIFICATION PROGRAM (§§ 121.901 — 121.925)
- Subpart Z - HAZARDOUS MATERIALS TRAINING PROGRAM (§§ 121.1001 — 121.1007)
- Appendix Special Federal Aviation Regulation No. 50-2
- Appendix Special Federal Aviation Regulation No. 71
- Appendix Special Federal Aviation Regulation No. 97
- Appendix A to Part 121 - First Aid Kits and Emergency Medical Kits
- Appendix B to Part 121 - Airplane Flight Recorder Specification
- Appendix E to Part 121 - Flight Training Requirements
- Appendix F to Part 121 - Proficiency Check Requirements
- Appendix G to Part 121 - Doppler Radar and Inertial Navigation System (INS): Request for Evaluation; Equipment and Equipment Installation; Training Program; Equipment Accuracy and Reliability; Evaluation Program
- Appendix H to Part 121 - Advanced Simulation
- Appendix K to Part 121 - Performance Requirements for Certain Turbopropeller Powered Airplanes
- Appendix N to Part 121 - Reserved
- Appendix O to Part 121 - Hazardous Materials Training Requirements For Certificate Holders
- Appendix P to Part 121 - Requirements for ETOPS and Polar Operations
- Section 121.1200-121.1399 - Reserved
- Section 121.1400-121.1499 - Reserved
- Appendix I-J to Part 121 - Reserved
- Appendix L to Part 121 - Type Certification Regulations Made Previously Effective
- Appendix C to Part 121 - C-46 Nontransport Category Airplanes
- Appendix D to Part 121 - Criteria for Demonstration of Emergency Evacuation Procedures Under Section 121.291
- Appendix M to Part 121 - Airplane Flight Recorder Specifications
- Subpart AA - CONTINUED AIRWORTHINESS AND SAFETY IMPROVEMENTS (§§ 121.1101 — 121.1119)
- Subpart DD - SPECIAL FEDERAL AVIATION REGULATIONS (§ 121.1500)