Which FAR would list requirements for preventive maintenance?

The correct answer is found in Part 43 of the Federal Aviation Regulations (FAR). This part specifically incorporates regulations pertaining to maintenance, preventive maintenance, alterations, and rebuilding of aircraft and their components. It outlines the standards and procedures necessary for conducting preventive maintenance to ensure aircraft safety and airworthiness.

Preventive maintenance refers to simple or minor preservation operations and the replacement of small standard parts that do not involve complex procedures. By defining these processes within Part 43, the FAR ensures that maintenance activities are carried out in a safe and effective manner, contributing to overall aviation safety.

Parts 21, 61, and 91 cover different aspects of regulation. Part 21 deals with the certification procedures for products and parts, Part 61 pertains to the certification of pilots and instructors, and Part 91 outlines the general operating and flight rules. While these parts are crucial to aviation regulation, they do not specifically address the requirements for preventive maintenance, which is why Part 43 is the comprehensive source for this information.