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U.S. Code of Federal Regula...
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Title 14—Aeronautics and Space
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CHAPTER I—FEDERAL AVIATION ...
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PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG...
PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS
§ 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.
§ 121.9 - Fraud and falsification.
§ 121.11 - Rules applicable to operations in a foreign country.
§ 121.15 - Carriage of narcotic drugs, marihuana, and depressant or stimulant drugs or substances.
§ 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.
§ 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.
§ 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.
§ 121.151 - Applicability.
§ 121.153 - Aircraft requirements: General.
§ 121.155 - Aircraft certification and equipment requirements.
§ 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.
§ 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.
§ 121.211 - Applicability.
§ 121.213 - Cabin interiors.
§ 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.
§ 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.
§ 121.321 - Operations in icing.
§ 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 - Applicability.
§ 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 - Contract maintenance.
§ 121.369 - Manual requirements.
§§ 121.370-121.370a - Required inspection personnel.
§ 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.
§ 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.
§ 121.392 - Personnel identified as 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.
§ 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.
§ 121.408 - Training equipment other than flight simulation training devices.
§ 121.409 - Training courses using airplane simulators and other training devices.
§ 121.410 - Airline transport pilot certification training program.
§ 121.411 - Qualifications: Check airmen (airplane) and check airmen (simulator).
§ 121.412 - Qualifications: Flight instructors (airplane) and flight instructors (simulator).
§ 121.413 - Initial, transition and recurrent training and checking requirements: Check airmen (airplane), check airmen (simulator).
§ 121.414 - Initial, transition and recurrent training and checking requirements: flight instructors (airplane), flight instructors (simulator).
§ 121.415 - Crewmember and dispatcher training program requirements.
§ 121.417 - Crewmember emergency training.
§ 121.418 - Differences training and related aircraft differences training.
§ 121.419 - Pilots and flight engineers: Initial, transition, and upgrade ground training.
§ 121.420 - Flight attendants: Initial and transition ground training.
§ 121.421 - Flight attendants: Initial and transition ground training.
§ 121.422 - Aircraft dispatchers: Initial and transition ground training.
§ 121.423 - Pilot: Extended Envelope Training.
§ 121.424 - Pilots: Initial, transition, and upgrade flight training.
§ 121.425 - Flight engineers: Initial and transition flight training.
§ 121.426 - Recurrent training.
§ 121.427 - Recurrent training.
§ 121.429 - Applicability.
§ 121.431 - Applicability.
§ 121.432 - General.
§ 121.433 - Training required.
§ 121.434 - Operating experience, operating cycles, and consolidation of knowledge and skills.
§ 121.435 - Pilot Qualification: Certificates and experience requirements.
§ 121.436 - Pilot Qualification: Certificates and experience requirements.
§ 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 - Flight engineer qualifications.
§ 121.453 - Flight engineer qualifications.
§§ 121.455-121.459 - Applicability.
§ 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.
§ 121.470 - Applicability.
§ 121.471 - Flight time limitations and rest requirements: All flight crewmembers.
§ 121.473 - Fatigue risk management system.
§ 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.
§ 121.495 - Fatigue risk management system.
§ 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.
§ 121.527 - Fatigue risk management system.
§ 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.
§ 121.544 - Pilot monitoring.
§ 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 and portable oxygen concentrators 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.
§ 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 - Applicability of reported weather minimums.
§ 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.
§ 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 - Load manifest: All certificate holders.
§ 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 - Maintenance log: Aircraft.
§ 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.
§ 121.721 - Applicability.
§ 121.723 - Surrender of international crewmember certificate.
§ 121.801 - Applicability.
§ 121.803 - Emergency medical equipment.
§ 121.805 - Crewmember training for in-flight medical events.
§ 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.
§ 121.1001 - Applicability and definitions.
§ 121.1003 - Hazardous materials training: General.
§ 121.1005 - Hazardous materials training required.
§ 121.1007 - Hazardous materials training records.
§ 121.1101 - Purpose and definition.
§ 121.1103 - Aging airplane inspections and records reviews.
§ 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.
§ 121.1119 - Fuel tank vent explosion protection.
§§ 121.1200-121.1399 - SFAR No. 111—Lavatory Oxygen Systems.
§§ 121.1400-121.1499 - SFAR No. 111—Lavatory Oxygen Systems.
§ 121.1500 - SFAR No. 111—Lavatory Oxygen Systems.