Federal Aviation Regulations Practice Test 2026 – Complete Exam Prep

FAR Part 121 specifically governs scheduled air carrier operations, which are operations conducted by commercial airlines that provide the public with air transportation. This part encompasses a wide range of regulations that ensure safety and reliability in air travel, including certification requirements for airlines, operational procedures, and maintenance standards.

Scheduled air carrier operations are characterized by their routine service on designated routes according to published flight schedules, which differentiates them from other types of aviation operations. This regulatory framework is crucial for maintaining high safety standards in the aviation industry, addressing everything from pilot training and aircraft maintenance to passenger handling and operational protocols.

In contrast, general aviation operations, flight training operations, and unscheduled air carrier operations fall under different regulatory sections, such as FAR Parts 91 and 135, which do not encompass the same level of operational detail and oversight as Part 121. Understanding the scope of FAR Part 121 is important for distinguishing between different aviation activities and the regulatory requirements that apply to them.