§121

PART 121--OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS

• Appendix - Special Federal Aviation Regulation No. 50-2
• Appendix - Special Federal Aviation Regulation No. 71
• Appendix - Special Federal Aviation Regulation No. 97
• Appendix - Special Federal Aviation Regulation 106 --Rules for use of portable oxygen concentrator systems on board aircraft

Subpart A--GENERAL

• §121.1 Applicability.
• §121.2 Compliance schedule for operators that transition to part 121; certain new entrant operators.
• §121.4 Applicability of rules to unauthorized operators.
• §121.7 Definitions.
• §121.11 Rules applicable to operations in a foreign country.
• §121.15 Carriage of narcotic drugs, marihuana, and depressant or stimulant drugs or substances.

Subpart E--APPROVAL OF ROUTES: DOMESTIC AND FLAG OPERATIONS

• §121.91 Applicability.
• §121.93 Route requirements: General.
• §121.95 Route width.
• §121.97 Airports: Required data.
• §121.99 Communications facilities--domestic and flag operations.
• §121.101 Weather reporting facilities.
• §121.103 En route navigation facilities.
• §121.105 Servicing and maintenance facilities.
• §121.106 ETOPS Alternate Airport: Rescue and fire fighting service.
• §121.107 Dispatch centers.

Subpart F--APPROVAL OF AREAS AND ROUTES FOR SUPPLEMENTAL OPERATIONS

• §121.111 Applicability.
• §121.113 Area and route requirements: General.
• §121.115 Route width.
• §121.117 Airports: Required data.
• §121.119 Weather reporting facilities.
• §121.121 En route navigation facilities.
• §121.122 Communications facilities--supplemental operations.
• §121.123 Servicing maintenance facilities.
• §121.125 Flight following system.
• §121.127 Flight following system; requirements.

Subpart G--MANUAL REQUIREMENTS

• §121.131 Applicability.
• §121.133 Preparation.
• §121.135 Manual contents.
• §121.137 Distribution and availability.
• §121.139 Requirements for manual aboard aircraft: Supplemental operations.
• §121.141 Airplane flight manual.

Subpart H--AIRCRAFT REQUIREMENTS

• §121.151 Applicability.
• §121.153 Aircraft requirements: General.
• §121.155 [Reserved]
• §121.157 Aircraft certification and equipment requirements.
• §121.159 Single-engine airplanes prohibited.
• §121.161 Airplane limitations: Type of route.
• §121.162 ETOPS Type Design Approval Basis.
• §121.163 Aircraft proving tests.

Subpart I--AIRPLANE PERFORMANCE OPERATING LIMITATIONS

• §121.171 Applicability.
• §121.173 General.
• §121.175 Airplanes: Reciprocating engine-powered: Weight limitations.
• §121.177 Airplanes: Reciprocating engine-powered: Takeoff limitations.
• §121.179 Airplanes: Reciprocating engine-powered: En route limitations: All engines operating.
• §121.181 Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative.
• §121.183 Part 25 airplanes with four or more engines: Reciprocating engine powered: En route limitations: Two engines inoperative.
• §121.185 Airplanes: Reciprocating engine-powered: Landing limitations: Destination airport.
• §121.187 Airplanes: Reciprocating engine-powered: Landing limitations: Alternate airport.
• §121.189 Airplanes: Turbine engine powered: Takeoff limitations.
• §121.191 Airplanes: Turbine engine powered: En route limitations: One engine inoperative.
• §121.193 Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.
• §121.195 Airplanes: Turbine engine powered: Landing limitations: Destination airports.
• §121.197 Airplanes: Turbine engine powered: Landing limitations: Alternate airports.
• §121.198 Cargo service airplanes: Increased zero fuel and landing weights.
• §121.199 Nontransport category airplanes: Takeoff limitations.
• §121.201 Nontransport category airplanes: En route limitations: One engine inoperative.
• §121.203 Nontransport category airplanes: Landing limitations: Destination airport.
• §121.205 Nontransport category airplanes: Landing limitations: Alternate airport.
• §121.207 Provisionally certificated airplanes: Operating limitations.

Subpart J--SPECIAL AIRWORTHINESS REQUIREMENTS

• §121.211 Applicability.
• §121.213 [Reserved]
• §121.215 Cabin interiors.
• §121.217 Internal doors.
• §121.219 Ventilation.
• §121.221 Fire precautions.
• §121.223 Proof of compliance with 121.221.
• §121.225 Propeller deicing fluid.
• §121.227 Pressure cross-feed arrangements.
• §121.229 Location of fuel tanks.
• §121.231 Fuel system lines and fittings.
• §121.233 Fuel lines and fittings in designated fire zones.
• §121.235 Fuel valves.
• §121.237 Oil lines and fittings in designated fire zones.
• §121.239 Oil valves.
• §121.241 Oil system drains.
• §121.243 Engine breather lines.
• §121.245 Fire walls.
• §121.247 Fire-wall construction.
• §121.249 Cowling.
• §121.251 Engine accessory section diaphragm.
• §121.253 Powerplant fire protection.
• §121.255 Flammable fluids.
• §121.257 Shutoff means.
• §121.259 Lines and fittings.
• §121.261 Vent and drain lines.
• §121.263 Fire-extinguishing systems.
• §121.265 Fire-extinguishing agents.
• §121.267 Extinguishing agent container pressure relief.
• §121.269 Extinguishing agent container compartment temperature.
• §121.271 Fire-extinguishing system materials.
• §121.273 Fire-detector systems.
• §121.275 Fire detectors.
• §121.277 Protection of other airplane components against fire.
• §121.279 Control of engine rotation.
• §121.281 Fuel system independence.
• §121.283 Induction system ice prevention.
• §121.285 Carriage of cargo in passenger compartments.
• §121.287 Carriage of cargo in cargo compartments.
• §121.289 Landing gear: Aural warning device.
• §121.291 Demonstration of emergency evacuation procedures.
• §121.293 Special airworthiness requirements for nontransport category airplanes type certificated after December 31, 1964.
• §121.295 Location for a suspect device.

Subpart K--INSTRUMENT AND EQUIPMENT REQUIREMENTS

• §121.301 Applicability.
• §121.303 Airplane instruments and equipment.
• §121.305 Flight and navigational equipment.
• §121.306 Portable electronic devices.
• §121.307 Engine instruments.
• §121.308 Lavatory fire protection.
• §121.309 Emergency equipment.
• §121.310 Additional emergency equipment.
• §121.311 Seats, safety belts, and shoulder harnesses.
• §121.312 Materials for compartment interiors.
• §121.313 Miscellaneous equipment.
• §121.314 Cargo and baggage compartments.
• §121.315 Cockpit check procedure.
• §121.316 Fuel tanks.
• §121.317 Passenger information requirements, smoking prohibitions, and additional seat belt requirements.
• §121.318 Public address system.
• §121.319 Crewmember interphone system.
• §121.323 Instruments and equipment for operations at night.
• §121.325 Instruments and equipment for operations under IFR or over-the-top.
• §121.327 Supplemental oxygen: Reciprocating engine powered airplanes.
• §121.329 Supplemental oxygen for sustenance: Turbine engine powered airplanes.
• §121.331 Supplemental oxygen requirements for pressurized cabin airplanes: Reciprocating engine powered airplanes.
• §121.333 Supplemental oxygen for emergency descent and for first aid; turbine engine powered airplanes with pressurized cabins.
• §121.335 Equipment standards.
• §121.337 Protective breathing equipment.
• §121.339 Emergency equipment for extended over-water operations.
• §121.340 Emergency flotation means.
• §121.341 Equipment for operations in icing conditions.
• §121.342 Pitot heat indication systems.
• §121.343 Flight data recorders.
• §121.344 Digital flight data recorders for transport category airplanes.
• §121.344a Digital flight data recorders for 10-19 seat airplanes.
• §121.345 Radio equipment.
• §121.346 Flight data recorders: filtered data.
• §121.347 Communication and navigation equipment for operations under VFR over routes navigated by pilotage.
• §121.349 Communication and navigation equipment for operations under VFR over routes not navigated by pilotage or for operations under IFR or over the top.
• §121.351 Communication and navigation equipment for extended over-water operations and for certain other operations.
• §121.353 Emergency equipment for operations over uninhabited terrain areas: Flag, supplemental, and certain domestic operations.
• §121.354 Terrain awareness and warning system.
• §121.355 Equipment for operations on which specialized means of navigation are used.
• §121.356 Collision avoidance system.
• §121.357 Airborne weather radar equipment requirements.
• §121.358 Low-altitude windshear system equipment requirements.
• §121.359 Cockpit voice recorders.
• §121.360 [Reserved]

Subpart L--MAINTENANCE, PREVENTIVE MAINTENANCE, AND ALTERATIONS

• §121.361 Applicability.
• §121.363 Responsibility for airworthiness.
• §121.365 Maintenance, preventive maintenance, and alteration organization.
• §121.367 Maintenance, preventive maintenance, and alterations programs.
• §121.368 [Reserved]
• §121.369 Manual requirements.
• §§121.370-121.370a [Reserved]
• §121.371 Required inspection personnel.
• §121.373 Continuing analysis and surveillance.
• §121.374 Continuous airworthiness maintenance program (CAMP) for two-engine ETOPS.
• §121.375 Maintenance and preventive maintenance training program.
• §121.377 Maintenance and preventive maintenance personnel duty time limitations.
• §121.378 Certificate requirements.
• §121.379 Authority to perform and approve maintenance, preventive maintenance, and alterations.
• §121.380 Maintenance recording requirements.
• §121.380a Transfer of maintenance records.

Subpart M--AIRMAN AND CREWMEMBER REQUIREMENTS

• §121.381 Applicability.
• §121.383 Airman: Limitations on use of services.
• §121.385 Composition of flight crew.
• §121.387 Flight engineer.
• §121.389 Flight navigator and specialized navigation equipment.
• §121.391 Flight attendants.
• §121.393 Crewmember requirements at stops where passengers remain on board.
• §121.394 Flight attendant requirements during passenger boarding and deplaning.
• §121.395 Aircraft dispatcher: Domestic and flag operations.
• §121.397 Emergency and emergency evacuation duties.

Subpart N--TRAINING PROGRAM

• §121.400 Applicability and terms used.
• §121.401 Training program: General.
• §121.402 Training program: Special rules.
• §121.403 Training program: Curriculum.
• §121.404 Compliance dates: Crew and dispatcher resource management training.
• §121.405 Training program and revision: Initial and final approval.
• §121.406 Credit for previous CRM/DRM training.
• §121.407 Training program: Approval of airplane simulators and other training devices.
• §121.409 Training courses using airplane simulators and other training devices.
• §121.411 Qualifications: Check airmen (airplane) and check airmen (simulator).
• §121.412 Qualifications: Flight instructors (airplane) and flight instructors (simulator).
• §121.413 Initial and transition training and checking requirements: Check airmen (airplane), check airmen (simulator).
• §121.414 Initial and transition training and checking requirements: flight instructors (airplane), flight instructors (simulator).
• §121.415 Crewmember and dispatcher training requirements.
• §121.417 Crewmember emergency training.
• §121.418 Differences training: Crewmembers and dispatchers.
• §121.419 Pilots and flight engineers: Initial, transition, and upgrade ground training.
• §121.420 Flight navigators: Initial and transition ground training.
• §121.421 Flight attendants: Initial and transition ground training.
• §121.422 Aircraft dispatchers: Initial and transition ground training.
• §121.424 Pilots: Initial, transition, and upgrade flight training.
• §121.425 Flight engineers: Initial and transition flight training.
• §121.426 Flight navigators: Initial and transition flight training.
• §121.427 Recurrent training.
• §121.429 [Reserved]

Subpart O--CREWMEMBER QUALIFICATIONS

• §121.431 Applicability.
• §121.432 General.
• §121.433 Training required.
• §121.434 Operating experience, operating cycles, and consolidation of knowledge and skills.
• §121.437 Pilot qualification: Certificates required.
• §121.438 Pilot operating limitations and pairing requirements.
• §121.439 Pilot qualification: Recent experience.
• §121.440 Line checks.
• §121.441 Proficiency checks.
• §121.443 Pilot in command qualification: Route and airports.
• §121.445 Pilot in command airport qualification: Special areas and airports.
• §121.447 [Reserved]
• §121.453 Flight engineer qualifications.
• §§121.455-121.459 [Reserved]

Subpart P--AIRCRAFT DISPATCHER QUALIFICATIONS AND DUTY TIME

• §121.461 Applicability.
• §121.463 Aircraft dispatcher qualifications.
• §121.465 Aircraft dispatcher duty time limitations: Domestic and flag operations.
• §121.467 Flight attendant duty period limitations and rest requirements: Domestic, flag, and supplemental operations.

Subpart Q--FLIGHT TIME LIMITATIONS AND REST REQUIREMENTS: DOMESTIC OPERATIONS

• §121.470 Applicability.
• §121.471 Flight time limitations and rest requirements: All flight crewmembers.

Subpart R--FLIGHT TIME LIMITATIONS: FLAG OPERATIONS

• §121.480 Applicability.
• §121.481 Flight time limitations: One or two pilot crews.
• §121.483 Flight time limitations: Two pilots and one additional flight crewmember.
• §121.485 Flight time limitations: Three or more pilots and an additional flight crewmember.
• §121.487 Flight time limitations: Pilots not regularly assigned.
• §121.489 Flight time limitations: Other commercial flying.
• §121.491 Flight time limitations: Deadhead transportation.
• §121.493 Flight time limitations: Flight engineers and flight navigators.

Subpart S--FLIGHT TIME LIMITATIONS: SUPPLEMENTAL OPERATIONS

• §121.500 Applicability.
• §121.503 Flight time limitations: Pilots: airplanes.
• §121.505 Flight time limitations: Two pilot crews: airplanes.
• §121.507 Flight time limitations: Three pilot crews: airplanes.
• §121.509 Flight time limitations: Four pilot crews: airplanes.
• §121.511 Flight time limitations: Flight engineers: airplanes.
• §121.513 Flight time limitations: Overseas and international operations: airplanes.
• §121.515 Flight time limitations: All airmen: airplanes.
• §121.517 Flight time limitations: Other commercial flying: airplanes.
• §121.519 Flight time limitations: Deadhead transportation: airplanes.
• §121.521 Flight time limitations: Crew of two pilots and one additional airman as required.
• §121.523 Flight time limitations: Crew of three or more pilots and additional airmen as required.
• §121.525 Flight time limitations: Pilots serving in more than one kind of flight crew.

Subpart T--FLIGHT OPERATIONS

• §121.531 Applicability.
• §121.533 Responsibility for operational control: Domestic operations.
• §121.535 Responsibility for operational control: Flag operations.
• §121.537 Responsibility for operational control: Supplemental operations.
• §121.538 Aircraft security.
• §121.539 Operations notices.
• §121.541 Operations schedules: Domestic and flag operations.
• §121.542 Flight crewmember duties.
• §121.543 Flight crewmembers at controls.
• §121.545 Manipulation of controls.
• §121.547 Admission to flight deck.
• §121.548 Aviation safety inspector's credentials: Admission to pilot's compartment.
• §121.548a DOD Commercial Air Carrier Evaluator's Credential.
• §121.549 Flying equipment.
• §121.550 Secret Service Agents: Admission to flight deck.
• §121.551 Restriction or suspension of operation: Domestic and flag operations.
• §121.553 Restriction or suspension of operation: Supplemental operations.
• §121.555 Compliance with approved routes and limitations: Domestic and flag operations.
• §121.557 Emergencies: Domestic and flag operations.
• §121.559 Emergencies: Supplemental operations.
• §121.561 Reporting potentially hazardous meteorological conditions and irregularities of ground facilities or navigation aids.
• §121.563 Reporting mechanical irregularities.
• §121.565 Engine inoperative: Landing; reporting.
• §121.567 Instrument approach procedures and IFR landing minimums.
• §121.569 Equipment interchange: Domestic and flag operations.
• §121.570 Airplane evacuation capability.
• §121.571 Briefing passengers before takeoff.
• §121.573 Briefing passengers: Extended overwater operations.
• §121.574 Oxygen for medical use by passengers.
• §121.575 Alcoholic beverages.
• §121.576 Retention of items of mass in passenger and crew compartments.
• §121.577 Stowage of food, beverage, and passenger service equipment during airplane movement on the surface, takeoff, and landing.
• §121.578 Cabin ozone concentration.
• §121.579 Minimum altitudes for use of autopilot.
• §121.580 Prohibition on interference with crewmembers.
• §121.581 Observer's seat: En route inspections.
• §121.582 Means to discreetly notify a flightcrew.
• §121.583 Carriage of persons without compliance with the passenger-carrying requirements of this part.
• §121.584 Requirement to view the area outside the flightdeck door.
• §121.585 Exit seating.
• §121.586 Authority to refuse transportation.
• §121.587 Closing and locking of flightcrew compartment door.
• §121.589 Carry-on baggage.
• §121.590 Use of certificated land airports in the United States.

Subpart U--DISPATCHING AND FLIGHT RELEASE RULES

• §121.591 Applicability.
• §121.593 Dispatching authority: Domestic operations.
• §121.595 Dispatching authority: Flag operations.
• §121.597 Flight release authority: Supplemental operations.
• §121.599 Familiarity with weather conditions.
• §121.601 Aircraft dispatcher information to pilot in command: Domestic and flag operations.
• §121.603 Facilities and services: Supplemental operations.
• §121.605 Airplane equipment.
• §121.607 Communication and navigation facilities: Domestic and flag operations.
• §121.609 Communication and navigation facilities: Supplemental operations.
• §121.611 Dispatch or flight release under VFR.
• §121.613 Dispatch or flight release under IFR or over the top.
• §121.615 Dispatch or flight release over water: Flag and supplemental operations.
• §121.617 Alternate airport for departure.
• §121.619 Alternate airport for destination: IFR or over-the-top: Domestic operations.
• §121.621 Alternate airport for destination: Flag operations.
• §121.623 Alternate airport for destination: IFR or over-the-top: Supplemental operations.
• §121.624 ETOPS Alternate Airports.
• §121.625 Alternate Airport weather minima.
• §121.627 Continuing flight in unsafe conditions.
• §121.628 Inoperable instruments and equipment.
• §121.629 Operation in icing conditions.
• §121.631 Original dispatch or flight release, redispatch or amendment of dispatch or flight release.
• §121.633 Considering time-limited systems in planning ETOPS alternates.
• §121.635 Dispatch to and from refueling or provisional airports: Domestic and flag operations.
• §121.637 Takeoffs from unlisted and alternate airports: Domestic and flag operations.
• §121.639 Fuel supply: All domestic operations.
• §121.641 Fuel supply: Nonturbine and turbo-propeller-powered airplanes: Flag operations.
• §121.643 Fuel supply: Nonturbine and turbo-propeller-powered airplanes: Supplemental operations.
• §121.645 Fuel supply: Turbine-engine powered airplanes, other than turbo propeller: Flag and supplemental operations.
• §121.646 En-route fuel supply: flag and supplemental operations.
• §121.647 Factors for computing fuel required.
• §121.649 Takeoff and landing weather minimums: VFR: Domestic operations.
• §121.651 Takeoff and landing weather minimums: IFR: All certificate holders.
• §121.652 Landing weather minimums: IFR: All certificate holders.
• §121.653 [Reserved]
• §121.655 Applicability of reported weather minimums.
• §121.657 Flight altitude rules.
• §121.659 Initial approach altitude: Domestic and supplemental operations.
• §121.661 Initial approach altitude: Flag operations.
• §121.663 Responsibility for dispatch release: Domestic and flag operations.
• §121.665 Load manifest.
• §121.667 Flight plan: VFR and IFR: Supplemental operations.

Subpart V--RECORDS AND REPORTS

• §121.681 Applicability.
• §121.683 Crewmember and dispatcher record.
• §121.685 Aircraft record: Domestic and flag operations.
• §121.687 Dispatch release: Flag and domestic operations.
• §121.689 Flight release form: Supplemental operations.
• §121.691 [Reserved]
• §121.693 Load manifest: All certificate holders.
• §121.695 Disposition of load manifest, dispatch release, and flight plans: Domestic and flag operations.
• §121.697 Disposition of load manifest, flight release, and flight plans: Supplemental operations.
• §§121.698-121.699 [Reserved]
• §121.701 Maintenance log: Aircraft.
• §121.703 Service difficulty reports.
• §121.705 Mechanical interruption summary report.
• §121.707 Alteration and repair reports.
• §121.709 Airworthiness release or aircraft log entry.
• §121.711 Communication records: Domestic and flag operations.
• §121.713 Retention of contracts and amendments: Commercial operators who conduct intrastate operations for compensation or hire.

Subpart W--CREWMEMBER CERTIFICATE: INTERNATIONAL

• §121.721 Applicability.
• §121.723 Surrender of international crewmember certificate.

Subpart X--EMERGENCY MEDICAL EQUIPMENT AND TRAINING

• §121.801 Applicability.
• §121.803 Emergency medical equipment.
• §121.805 Crewmember training for in-flight medical events.

Subpart Y--ADVANCED QUALIFICATION PROGRAM

• §121.901 Purpose and eligibility.
• §121.903 General requirements for Advanced Qualification Programs.
• §121.905 Confidential commercial information.
• §121.907 Definitions.
• §121.909 Approval of Advanced Qualification Program.
• §121.911 Indoctrination curriculum.
• §121.913 Qualification curriculum.
• §121.915 Continuing qualification curriculum.
• §121.917 Other requirements.
• §121.919 Certification.
• §121.921 Training devices and simulators.
• §121.923 Approval of training, qualification, or evaluation by a person who provides training by arrangement.
• §121.925 Recordkeeping requirements.

Subpart Z--HAZARDOUS MATERIALS TRAINING PROGRAM

• §121.1001 Applicability and definitions.
• §121.1003 Hazardous materials training: General.
• §121.1005 Hazardous materials training required.
• §121.1007 Hazardous materials training records.

Subpart AA--AIRWORTHINESS AND SAFETY IMPROVEMENTS

• §121.1101 Purpose and definition.
• §121.1103 [Reserved]
• §121.1105 Aging airplane inspections and records reviews.
• §121.1107 Repairs assessment for pressurized fuselages.
• §121.1109 Supplemental inspections.
• §121.1111 Electrical wiring interconnection systems (EWIS) maintenance program.
• §121.1113 Fuel tank system maintenance program.
• §121.1115 Limit of validity.
• §121.1117 Flammability reduction means.

Subpart BB--[RESERVED]

• §§121.1200-121.1399 [Reserved]

Subpart CC--[RESERVED]

• §§121.1400-121.1499 [Reserved]

Subpart DD--SPECIAL FEDERAL AVIATION REGULATIONS

• §121.1500 SFAR No. 111--Lavatory Oxygen Systems.
• Appendix - Appendix A to Part 121 --First Aid Kits and Emergency Medical Kits
• Appendix - Appendix B to Part 121 --Airplane Flight Recorder Specification
• Appendix - Appendix C to Part 121 --C-46 Nontransport Category Airplanes
• Appendix - Appendix D to Part 121 --Criteria for Demonstration of Emergency Evacuation Procedures Under 121.291
• Appendix - Appendix E to Part 121 --Flight Training Requirements
• Appendix - Appendix F to Part 121 --Proficiency Check Requirements
• Appendix - 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 - Appendix H to Part 121 --Advanced Simulation
• Appendix - Appendices I -J to Part 121--[Reserved]
• Appendix - Appendix K to Part 121 --Performance Requirements for Certain Turbopropeller Powered Airplanes

Appendix - Appendix L to Part 121 --Type Certification Regulations Made Previously Effective

• Appendix - Appendix M to Part 121 --Airplane Flight Recorder Specifications
• Appendix - Appendix N to Part 121 --[Reserved]
• Appendix - Appendix O to Part 121 --Hazardous Materials Training Requirements For Certificate Holders
• Appendix - Appendix P to Part 121 --Requirements for ETOPS and Polar Operations