Air Carrier Regulations
Air Carrier Regulations is a core knowledge area on the Airline Transport Pilot FAA written exam. This hub collects our 25 in-depth, ACS-aligned air carrier regulations articles — each written in plain English and grounded in the official FAA handbooks. Work through them below, then drill the topic with practice questions.
Airline Transport Pilot Practical Test Standards and ACS
The ATP Practical Test Standards and Airman Certification Standards define every task an ATP candidate must demonstrate; understanding their structure helps you prepare strategically and avoid common checkride pitfalls.
14 CFR Part 121 Operating Certificate Requirements
Part 121 governs scheduled air carrier operations and sets the certification, equipment, and operational standards every airline must meet before carrying passengers for hire on large or turbine-powered aircraft.
Air Carrier Operating Specifications and Their Legal Authority
Air carrier operating specifications define the exact terms, conditions, and limitations under which a certificate holder may conduct operations, carrying the force of federal law and binding both the carrier and its employees.
Part 121 Crew Resource Management Training Requirements
Part 121 requires all crewmembers to complete approved Crew Resource Management training, emphasizing communication, decision-making, and workload management to reduce human-factor accidents.
Fatigue Risk Management Systems for Air Carriers
Fatigue Risk Management Systems (FRMS) allow air carriers to use a data-driven, science-based approach to manage crew fatigue as an alternative or supplement to prescriptive rest rules under 14 CFR Part 117.
Part 121 Dispatch and Operational Control Requirements
Part 121 air carriers must share operational control between the pilot-in-command and an FAA-certificated dispatcher, making dispatch release authority and go/no-go decisions a joint responsibility grounded in federal regulation.
Pilot Records Improvement Act and PRIA Database Requirements
The Pilot Records Improvement Act (PRIA) requires air carriers to check a pilot's complete employment, training, and accident history before hiring, ensuring only qualified pilots operate commercial flights.
ATP Certificate Aeronautical Experience Requirements Under Part 61
To earn an ATP certificate under Part 61, pilots must meet strict aeronautical experience requirements including minimum flight hours, specific categories of experience, and training milestones that vary by certificate type.
Flight and Duty Time Limitations Under Part 117
Part 117 sets strict flight time, duty period, and rest requirements for Part 121 air carrier flightcrew members to combat fatigue; knowing its key numbers is essential for the ATP written exam.
Part 121 Weather Minimums and Alternate Airport Requirements
Part 121 air carrier weather minimums and alternate airport requirements set strict thresholds that ATP pilots must master—they differ significantly from general aviation rules and are heavily tested on the ATP knowledge exam.
Air Carrier Aircraft Maintenance and Airworthiness Requirements
Air carriers operating under 14 CFR Parts 121 and 135 must meet strict maintenance, inspection, and airworthiness standards that go well beyond general aviation requirements, ensuring every revenue flight departs in an airworthy condition.
Part 121 Minimum Equipment List and Dispatch Deviation Guide
A Part 121 MEL and DDG let air carriers legally dispatch aircraft with certain inoperative equipment by defining conditions, limitations, and required procedures before flight.
Cockpit Voice Recorder and Flight Data Recorder Regulations
CVRs and FDRs are federally mandated safety tools on most air carrier aircraft; understanding which aircraft require them, what they record, and how long data must be retained is essential for ATP-level knowledge.
Part 121 Passenger Safety Briefing and Cabin Crew Requirements
Part 121 requires specific pre-departure passenger safety briefings and mandates minimum cabin crew numbers based on seating capacity, both of which are critical air carrier regulatory requirements for ATP candidates.
ATP Restricted Privileges and the ATP-CTP Course Requirement
The ATP certificate comes in two flavors—full ATP and ATP with restricted privileges—and understanding the difference, plus the required ATP-CTP course, is critical for anyone planning a career flying passengers for hire.
ETOPS Authorization and Extended Overwater Operations Rules
ETOPS authorization allows twin-engine airliners to fly routes far from diversion airports, requiring special maintenance, crew training, and dispatch procedures beyond standard air carrier rules.
Emergency Evacuation Demonstration and Exit Row Seating Requirements
14 CFR 121.291 governs the emergency evacuation demonstration air carriers must conduct; 14 CFR 121.585 governs exit-row seating passenger eligibility. Understanding both regs — and not conflating them — is a directly tested ATP item.
Carriage of Dangerous Goods and Hazardous Materials on Air Carriers
Air carriers operating under 14 CFR Parts 121 and 135 must follow strict rules governing the acceptance, labeling, stowage, and notification of dangerous goods and hazardous materials, rooted primarily in 14 CFR Part 175 and DOT/ICAO standards.
Part 135 IFR Fuel and Alternate Requirements Compared to Part 121
Part 135 IFR fuel and alternate rules differ significantly from Part 121 in minimums, alternate selection, and dispatch authority—understanding these distinctions is essential for ATP candidates and air carrier operators.
Line Checks, Proficiency Checks, and Recurrent Training Cycles
Air carriers operating under 14 CFR Part 121 must ensure each pilot completes line checks, proficiency checks, and recurrent training on specific cycles to maintain currency and flight safety.
High Minimums Captain Rules and the 100-Hour PIC Requirement
14 CFR 121.652 restricts newly qualified airline captains to higher weather minimums and mandates 100 hours of PIC time in the aircraft type before operating to standard minimums.
Special Airports and Captain Route Qualification Requirements
14 CFR 121.445 requires Part 121 airline captains to meet special airport qualification before serving as pilot-in-command into airports where specific terrain, obstacles, or procedures demand extra training beyond the standard line check.
Augmented Crew and Long-Haul Flight Time Limitations
Augmented crew operations allow long-haul air carriers to extend flight time beyond standard limits by adding extra pilots who rest in flight, subject to strict 14 CFR 117 requirements that govern how rest periods, cumulative limits, and rest facility class interact.
Aircraft Heavy Maintenance Checks: A, B, C, and D Inspection Cycles
Heavy maintenance checks (A, B, C, and D) are scheduled interval inspections required of air carrier aircraft under 14 CFR Part 121, ensuring structural and systems integrity across an aircraft's service life.
Air Carrier Drug and Alcohol Testing Program Requirements
Air carriers operating under 14 CFR Parts 121 and 135 must maintain DOT-mandated drug and alcohol testing programs for safety-sensitive employees, covering pre-employment, random, post-accident, reasonable suspicion, return-to-duty, and follow-up testing.
More Airline Transport Pilot subjects
Articles are original summaries grounded in the public-domain FAA handbooks and cite their source. ACS-aligned study aids — not a substitute for the official handbooks or regulations.