FAA Federal Aviation Regulations (FARS, 14 CFR)

FARs   >   Part 121 - Operating requirements: Domestic, flag, and supplemental operations

• SFAR No. 14
• SFAR No. 36
• SFAR No. 58 - Advanced Qualification Program
• SFAR No. 80 - Alternative Communications and Dispatching Procedures

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

• SUBPART B - [Reserved]

• SUBPART C - [Reserved]

• SUBPART D - [Reserved]

• SUBPART E - Approval of Routes: Domestic and Flag Operations
• FAR 121.91 - Applicability
• FAR 121.93 - Route requirements: General
• FAR 121.95 - Route width
• FAR 121.97 - Airports: Required data
• FAR 121.99 - Communication facilities
• FAR 121.101 - Weather reporting facilities
• FAR 121.103 - En route navigational facilities
• FAR 121.105 - Servicing and maintenance facilities
• FAR 121.107 - Dispatch centers

• SUBPART F - Approval of Areas and Routes for Supplemental Operations
• FAR 121.111 - Applicability
• FAR 121.113 - Area and route requirements: General
• FAR 121.115 - Route width
• FAR 121.117 - Airports: Required data
• FAR 121.119 - Weather reporting facilities
• FAR 121.121 - En route navigational facilities
• FAR 121.123 - Servicing maintenance facilities
• FAR 121.125 - Flight following system
• FAR 121.127 - Flight following system; requirements

• SUBPART G - Manual Requirements
• FAR 121.131 - Applicability
• FAR 121.133 - Preparation
• FAR 121.135 - Contents
• FAR 121.137 - Distribution and availability
• FAR 121.139 - Requirements for manual aboard aircraft: Supplemental operations
• FAR 121.141 - Airplane flight manual

• SUBPART H - Aircraft Requirements
• FAR 121.151 - Applicability
• FAR 121.153 - Aircraft requirements: General
• FAR 121.155 - [Reserved]
• FAR 121.157 - Aircraft certification and equipment requirements
• FAR 121.159 - Single-engine airplanes prohibited
• FAR 121.161 - Airplane limitations: Type of route
• FAR 121.163 - Aircraft proving tests

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

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

• SUBPART K - Instrument and Equipment Requirements
• FAR 121.301 - Applicability
• FAR 121.303 - Airplane instruments and equipment
• FAR 121.305 - Flight and navigational equipment
• FAR 121.306 - Portable electronic devices
• FAR 121.307 - Engine instruments
• FAR 121.308 - Lavatory fire protection
• FAR 121.309 - Emergency equipment
• FAR 121.310 - Additional emergency equipment
• FAR 121.311 - Seats, safety belts, and shoulder harnesses
• FAR 121.312 - Materials for compartment interiors
• FAR 121.313 - Miscellaneous equipment
• FAR 121.314 - Cargo and baggage compartments
• FAR 121.315 - Cockpit check procedure
• FAR 121.316 - Fuel tanks
• FAR 121.317 - Passenger information requirements, smoking prohibitions, and additional seat belt requirements
• FAR 121.318 - Public address system
• FAR 121.319 - Crewmember interphone system
• FAR 121.321 - [Reserved]
• FAR 121.323 - Instruments and equipment for operations at night
• FAR 121.325 - Instruments and equipment for operations under IFR or over-the-top
• FAR 121.327 - Supplemental oxygen: Reciprocating engine powered airplanes
• FAR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes
• FAR 121.331 - Supplemental oxygen requirements for pressurized cabin airplanes: Reciprocating engine powered airplanes
• FAR 121.333 - Supplemental oxygen for emergency descent and for first aid; turbine engine powered airplanes with pressurized cabins
• FAR 121.335 - Equipment standards
• FAR 121.337 - Protective breathing equipment
• FAR 121.339 - Emergency equipment for extended over-water operations
• FAR 121.340 - Emergency flotation means
• FAR 121.341 - Equipment for operations in icing conditions
• FAR 121.342 - Pitot heat indication systems
• FAR 121.343 - Flight recorders
• FAR 121.344 - Digital flight data recorders for transport category airplanes
• FAR 121.345 - Radio equipment
• FAR 121.347 - Radio equipment for operations under VFR over routes navigated by pilotage
• FAR 121.349 - Radio equipment for operations under VFR over routes not navigated by pilotage or for operations under IFR or over-the-top
• FAR 121.351 - Radio equipment for extended overwater operations and for certain other operations
• FAR 121.353 - Emergency equipment for operations over uninhabited terrain areas: Flag, supplemental, and certain domestic operations
• FAR 121.354 - Terrain awareness and warning system
• FAR 121.355 - Equipment for operations on which specialized means of navigation are used
• FAR 121.356 - Traffic Alert and Collision Avoidance System
• FAR 121.357 - Airborne weather radar equipment requirements
• FAR 121.358 - Low-altitude windshear system equipment requirements
• FAR 121.359 - Cockpit voice recorders
• FAR 121.360 - Ground proximity warning-glide slope deviation alerting system

• SUBPART L - Maintenance, Preventive Maintenance, and Alterations
• FAR 121.361 - Applicability
• FAR 121.363 - Responsibility for airworthiness
• FAR 121.365 - Maintenance, preventive maintenance, and alteration organization
• FAR 121.367 - Maintenance, preventive maintenance, and alterations programs
• FAR 121.368 - Aging airplane inspections and records reviews
• FAR 121.369 - Manual requirements
• FAR 121.370 - Repair assessment for pressurized fuselages
• FAR 121.371 - Required inspection personnel
• FAR 121.373 - Continuing analysis and surveillance
• FAR 121.375 - Maintenance and preventive maintenance training program
• FAR 121.377 - Maintenance and preventive maintenance personnel duty time limitations
• FAR 121.378 - Certificate requirements
• FAR 121.379 - Authority to perform and approve maintenance, preventive maintenance, and alterations
• FAR 121.380 - Maintenance recording requirements

• SUBPART M - Airman and Crewmember Requirements
• FAR 121.381 - Applicability
• FAR 121.383 - Airman: Limitations on use of services
• FAR 121.385 - Composition of flight crew
• FAR 121.387 - Flight engineer
• FAR 121.389 - Flight navigator and specialized navigation equipment
• FAR 121.391 - Flight attendants
• FAR 121.393 - Crewmember requirements at stops where passengers remain on board
• FAR 121.395 - Aircraft dispatcher: Domestic and flag operations
• FAR 121.397 - Emergency and emergency evacuation duties

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

• SUBPART O - Crewmember Qualifications
• FAR 121.431 - Applicability
• FAR 121.432 - General
• FAR 121.433 - Training required
• FAR 121.434 - Operating experience, operating cycles, and consolidation of knowledge and skills
• FAR 121.437 - Pilot qualification: Certificates required
• FAR 121.438 - Pilot operating limitations and pairing requirements
• FAR 121.439 - Pilot qualification: Recent experience
• FAR 121.440 - Line checks
• FAR 121.441 - Proficiency checks
• FAR 121.443 - Pilot in command qualification: Route and airports
• FAR 121.445 - Pilot in command airport qualification: Special areas and airports
• FAR 121.447 - [Reserved]
• FAR 121.453 - Flight engineer qualifications
• FAR 121.455 - Use of prohibited drugs
• FAR 121.457 - Testing for prohibited drugs
• FAR 121.458 - Misuse of alcohol
• FAR 121.459 - Testing for alcohol

• SUBPART P - Aircraft Dispatcher Qualifications and Duty Time
• FAR 121.461 - Applicability
• FAR 121.463 - Aircraft dispatcher qualifications
• FAR 121.465 - Aircraft dispatcher duty time limitations: Domestic and flag operations
• FAR 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
• FAR 121.470 - Applicability
• FAR 121.471 - Flight time limitations and rest requirements: All flight crewmembers

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

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

• SUBPART T - Flight Operations
• FAR 121.531 - Applicability
• FAR 121.533 - Responsibility for operational control: Domestic operations
• FAR 121.535 - Responsibility for operational control: Flag operations
• FAR 121.537 - Responsibility for operational control: Supplemental operations
• FAR 121.538 - Aircraft security
• FAR 121.539 - Operations notices
• FAR 121.541 - Operations schedules: Domestic and flag operations
• FAR 121.542 - Flight crewmember duties
• FAR 121.543 - Flight crewmembers at controls
• FAR 121.545 - Manipulation of controls
• FAR 121.547 - Admission to flight deck
• FAR 121.548 - Aviation safety inspector's credentials: Admission to pilot's compartment
• FAR 121.549 - Flying equipment
• FAR 121.550 - Secret Service Agents: Admission to flight deck
• FAR 121.551 - Restriction or suspension of operation: Domestic and flag operations
• FAR 121.553 - Restriction or suspension of operation: Supplemental operations
• FAR 121.555 - Compliance with approved routes and limitations: Domestic and flag operations
• FAR 121.557 - Emergencies: Domestic and flag operations
• FAR 121.559 - Emergencies: Supplemental operations
• FAR 121.561 - Reporting potentially hazardous meteorological conditions and irregularities of ground and navigation facilities
• FAR 121.563 - Reporting mechanical irregularities
• FAR 121.565 - Engine inoperative: Landing; reporting
• FAR 121.567 - Instrument approach procedures and IFR landing minimums
• FAR 121.569 - Equipment interchange: Domestic and flag operations
• FAR 121.570 - Airplane evacuation capability
• FAR 121.571 - Briefing passengers before takeoff
• FAR 121.573 - Briefing passengers: Extended overwater operations
• FAR 121.574 - Oxygen for medical use by passengers
• FAR 121.575 - Alcoholic beverages
• FAR 121.576 - Retention of items of mass in passenger and crew compartments
• FAR 121.577 - Stowage of food, beverage, and passenger service equipment during airplane movement on the surface, takeoff, and landing
• FAR 121.578 - Cabin ozone concentration
• FAR 121.579 - Minimum altitudes for use of autopilot
• FAR 121.580 - Prohibition on interference with crewmembers
• FAR 121.581 - Observer's seat: En route inspections
• FAR 121.583 - Carriage of persons without compliance with the passenger-carrying requirements of this part
• FAR 121.585 - Exit seating
• FAR 121.586 - Authority to refuse transportation
• FAR 121.587 - Closing and locking of flightcrew compartment door
• FAR 121.589 - Carry-on baggage
• FAR 121.590 - Use of certificated land airports

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

• SUBPART V - Records and Reports
• FAR 121.681 - Applicability
• FAR 121.683 - Crewmember and dispatcher record
• FAR 121.685 - Aircraft record: Domestic and flag operations
• FAR 121.687 - Dispatch release: Flag and domestic operations
• FAR 121.689 - Flight release form: Supplemental operations
• FAR 121.691 - [Reserved]
• FAR 121.693 - Load manifest: All certificate holders
• FAR 121.695 - Disposition of load manifest, dispatch release, and flight plans: Domestic and flag operations
• FAR 121.697 - Disposition of load manifest, flight release, and flight plans: Supplemental operations
• FAR 121.699 - [Reserved]
• FAR 121.701 - Maintenance log: Aircraft
• FAR 121.703 - Mechanical reliability reports
• FAR 121.704 - Service difficulty reports (structural)
• FAR 121.705 - Mechanical interruption summary report
• FAR 121.707 - Alteration and repair reports
• FAR 121.709 - Airworthiness release or aircraft log entry
• FAR 121.711 - Communication records: Domestic and flag operations
• FAR 121.713 - Retention of contracts and amendments: Commercial operators who conduct intrastate operations for compensation or hire

• SUBPART W - Crewmember Certificate: International
• FAR 121.721 - Applicability
• FAR 121.723 - Surrender of international crewmember certificate

• SUBPART X - Emergency Medical Equipment and Training
• FAR 121.801 - Applicability
• FAR 121.803 - Emergency medical equipment
• FAR 121.805 - Crewmember training for in-flight medical events

• Appendix A to Part 121 - First-Aid Kits and Emergency Medical Kits
• Appendix B to Part 121 - Airplane Flight Recorder Specification
• Appendix C1 to Part 121 - C-46 Nontransport Category Airplanes
• Appendix C2 to Part 121 - C-46 Nontransport Category Airplanes - TABLES
• Appendix C3 to Part 121 - C-46 Nontransport Category Airplanes - GRAPHS
• Appendix C4 to Part 121 - C-46 Nontransport Category Airplanes - GRAPHS 2
• Appendix D to Part 121 - Criteria for Demonstration of Emergency Evacuation Procedures Under §121.291
• 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 I to Part 121 - Drug Testing Program
• Appendix J to Part 121 - Alcohol Misuse Prevention Program
• Appendix K to Part 121 - Performance Requirements for Certain Turbopropeller Powered Airplanes
• Appendix L to Part 121 - Type Certification Regulations Made Previously Effective
• Appendix M to Part 121 - Airplane Flight Recorder Specifications
• Appendix N to Part 121 - Design-Life Goals

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