Large airplanes must be inspected in accordance with which part of the Federal Aviation Regulation?

The correct answer relates to Part 91 of the Federal Aviation Regulation (FAR), which outlines the general operating and flight rules for civil aviation, including the maintenance and inspection requirements for aircraft. Specifically, Section 91.403 states that the owner or operator of an aircraft is responsible for maintaining it in an airworthy condition and ensuring it complies with the maintenance requirements stipulated in the regulations. This part emphasizes the necessity for regular checks and inspections, thereby establishing a framework to support safety and operational integrity in aviation.

Part 95 deals with IFR (Instrument Flight Rules) operations in the National Airspace System, while Part 71 addresses the classification of controlled airspace. Part 136 involves commuter operations and specialized air transport rules. None of these parts provide the comprehensive inspection framework necessary for large airplanes that is found in Part 91. Therefore, recognizing that Part 91 directly pertains to maintenance and inspection for all types of aircraft, including large airplanes, solidifies its status as the correct choice in this context.