65 

Federal Aviation Administration, DOT 

Pt. 121 

121.489

Flight time limitations: Other com-

mercial flying. 

121.491

Flight time limitations: Deadhead 

transportation. 

121.493

Flight time limitations: Flight engi-

neers and flight navigators. 

121.495

Fatigue risk management system. 

Subpart S—Flight Time Limitations: 

Supplemental Operations 

121.500

Applicability. 

121.503

Flight time limitations: Pilots: air-

planes. 

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 engi-

neers: 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 com-

mercial flying: airplanes. 

121.519

Flight time limitations: Deadhead 

transportation: airplanes. 

121.521

Flight time limitations: Crew of two 

pilots and one additional airman as re-
quired. 

121.523

Flight time limitations: Crew of 

three or more pilots and additional air-
men as required. 

121.525

Flight time limitations: Pilots serv-

ing in more than one kind of flight crew. 

121.527

Fatigue risk management system. 

Subpart T—Flight Operations 

121.531

Applicability. 

121.533

Responsibility for operational con-

trol: Domestic operations. 

121.535

Responsibility for operational con-

trol: Flag operations. 

121.537

Responsibility for operational con-

trol: 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 creden-

tials: Admission to pilot’s compartment. 

121.548a

DOD Commercial Air Carrier Eval-

uator’s Credential. 

121.549

Flying equipment. 

121.550

Secret Service Agents: Admission to 

flight deck. 

121.551

Restriction or suspension of oper-

ation: Domestic and flag operations. 

121.553

Restriction or suspension of oper-

ation: Supplemental operations. 

121.555

Compliance with approved routes 

and limitations: Domestic and flag oper-
ations. 

121.557

Emergencies: Domestic and flag op-

erations. 

121.559

Emergencies: Supplemental oper-

ations. 

121.561

Reporting potentially hazardous me-

teorological conditions and irregularities 
of ground facilities or navigation aids. 

121.563

Reporting mechanical irregularities. 

121.565

Engine inoperative: Landing; report-

ing. 

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 con-

centrators for medical use by passengers. 

121.575

Alcoholic beverages. 

121.576

Retention of items of mass in pas-

senger and crew compartments. 

121.577

Stowage of food, beverage, and pas-

senger service equipment during airplane 
movement on the surface, takeoff, and 
landing. 

121.578

Cabin ozone concentration. 

121.579

Minimum altitudes for use of auto- 

pilot. 

121.580

Prohibition on interference with 

crewmembers. 

121.581

Observer’s seat: En route inspec-

tions. 

121.582

Means to discreetly notify a 

flightcrew. 

121.583

Carriage of persons without compli-

ance with the passenger-carrying re-
quirements of this part. 

121.584

Requirement to view the area out-

side the flightdeck door. 

121.585

Exit seating. 

121.586

Authority to refuse transportation. 

121.587

Closing and locking of flight crew 

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 op-

erations. 

121.595

Dispatching authority: Flag oper-

ations. 

121.597

Flight release authority: Supple-

mental operations. 

121.599

Familiarity with weather condi-

tions. 

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