What is the purpose of 14 CFR Part 43?

• A. It describes maintenance, preventative maintenance, rebuilding, and alteration of certificated aircraft.
• B. It describes aircraft lighting requirements.
• C. It defines airspace classes.
• D. It governs pilot licensing.

Answer: (A)

Part 43 lays out how maintenance work is performed on certificated aircraft and how that work must be documented to keep the aircraft airworthy. It defines what counts as maintenance, preventive maintenance, rebuilding, and alteration, who may perform these tasks (typically licensed mechanics or approved repair facilities), and how the work and any changes are recorded so there is a clear, traceable history of safety-critical work. This framework ensures that any maintenance that could affect airworthiness is done to recognized standards and properly documented.

The other topics listed are governed by different parts of the regulations—lighting requirements are addressed elsewhere, airspace classifications are defined in different sections, and pilot licensing is covered by another part—so they don’t describe the purpose of Part 43.