14 C.F.R. PART 121--OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS


TITLE 14--Aeronautics and Space

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION

SUBCHAPTER G--AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS

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

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Appendix
Special Federal Aviation Regulation No. 14
Appendix
Special Federal Aviation Regulation No. 36
Appendix
Special Federal Aviation Regulation No. 50-2
Appendix
Special Federal Aviation Regulation No. 71
Appendix
Special Federal Aviation Regulation No. 78
Appendix
Special Federal Aviation Regulation 80--Alternative Communications and Dispatching Procedures
Appendix
Special Federal Aviation Regulation 92-5--Flightcrew Compartment Access and Door Designs
Appendix
Special Federal Aviation Regulation No. 93
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.
�121.11
Rules applicable to operations in a foreign country.
�121.15
Carriage of narcotic drugs, marihuana, and depressant or stimulant drugs or substances.
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Subpart B--CERTIFICATION RULES FOR DOMESTIC AND FLAG AIR CARRIERS--[RESERVED]

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Subpart C--CERTIFICATION RULES FOR SUPPLEMENTAL AIR CARRIERS AND COMMERCIAL OPERATORS--[RESERVED]

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Subpart D--RULES GOVERNING ALL CERTIFICATE HOLDERS UNDER THIS PART--[RESERVED]

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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
Communication facilities.
�121.101
Weather reporting facilities.
�121.103
En route navigational facilities.
�121.105
Servicing and maintenance facilities.
�121.107
Dispatch centers.
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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 navigational facilities.
�121.123
Servicing maintenance facilities.
�121.125
Flight following system.
�121.127
Flight following system; requirements.
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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.
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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.
�121.163
Aircraft proving tests.
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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.
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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.
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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.
�121.321
[Reserved]
�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 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.
�121.347
Radio equipment for operations under VFR over routes navigated by pilotage.
�121.349
Radio equipment for operations under VFR over routes not navigated by pilotage or for operations under IFR or over-the-top.
�121.351
Radio equipment for extended overwater 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
Ground proximity warning-glide slope deviation alerting system.
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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
Aging airplane inspections and records reviews.
�121.369
Manual requirements.
�121.370
Special maintenance program requirements.
�121.370a
Supplemental inspections.
�121.371
Required inspection personnel.
�121.373
Continuing analysis and surveillance.
�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.
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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.
�121.395
Aircraft dispatcher: Domestic and flag operations.
�121.397
Emergency and emergency evacuation duties.
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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
Prohibited drugs.
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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
Use of prohibited drugs.
�121.457
Testing for prohibited drugs.
�121.458
Misuse of alcohol.
�121.459
Testing for alcohol.
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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.
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Subpart Q--FLIGHT TIME LIMITATIONS AND REST REQUIREMENTS: DOMESTIC OPERATIONS

�121.470
Applicability.
�121.471
Flight time limitations and rest requirements: All flight crewmembers.
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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.
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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.
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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 and navigation facilities.
�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.
�121.583
Carriage of persons without compliance with the passenger-carrying requirements of this part.
�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.
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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.
�121.625
Alternate airport weather minimums.
�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
[Reserved]
�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.
�121.647
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.
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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.
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Subpart W--CREWMEMBER CERTIFICATE: INTERNATIONAL

�121.721
Applicability.
�121.723
Surrender of international crewmember certificate.
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Subpart X--EMERGENCY MEDICAL EQUIPMENT AND TRAINING

�121.801
Applicability.
�121.803
Emergency medical equipment.
�121.805
Crewmember training for in-flight medical events.
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Subpart Y--AVANCED 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.
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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.
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
Appendix I to Part 121--Drug Testing Program
Appendix
Appendix J to Part 121--Alcohol Misuse Prevention Program
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--Hazardous Materials Training Requirements For Certificate Holders
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