FAA Aircraft Dispatcher Practice Exam

The regulation that outlines the specific duties of the pilot in command is found in 14 CFR Part 121. This part of the Code of Federal Regulations governs the operation of scheduled air carriers and provides detailed stipulations regarding the responsibilities of the pilot in command, including operational authority, safety management, and compliance with regulations.

14 CFR Part 121 is crucial for flight operations involving larger aircraft and is applicable to air carriers that operate under the authority of the Federal Aviation Administration (FAA). Responsibilities under this part include ensuring the safety of the aircraft, crew, and passengers, as well as adherence to regulatory requirements for flight operations.

While other parts referenced in the options, such as Part 91, Part 135, and Part 145, cover different areas of aviation regulation (including general operating rules, commuter operations, and maintenance respectively), they do not specifically detail the comprehensive duties of the pilot in command as thoroughly as Part 121 does in the context of scheduled air carrier operations. Thus, Part 121 is the most relevant regulation for understanding the duties of the pilot in command within its regulatory framework.