The clean-aircraft concept is derived from which regulation?

The clean-aircraft concept is derived from which regulation?

• A. FAR 121.629
• B. FAR 91.3
• C. FAR 23.25
• D. FAR 61.3

Answer: (A)

Regulatory basis for releasing an aircraft in a clean condition. The clean-aircraft concept is about ensuring an aircraft is turned over for flight in a clean, safe state—no tools, no loose debris, and no contamination in critical areas that could affect safety. This concept is codified in the regulation that governs air carrier operations and the release of aircraft for flight, making it the authoritative standard for preflight cleanliness under Part 121. That’s why this option is the best answer. Other regulations cover different topics—pilot responsibilities, certification of small airplanes, or general pilot certificate procedures—and do not establish the clean-aircraft release practice.

Regulatory basis for releasing an aircraft in a clean condition. The clean-aircraft concept is about ensuring an aircraft is turned over for flight in a clean, safe state—no tools, no loose debris, and no contamination in critical areas that could affect safety. This concept is codified in the regulation that governs air carrier operations and the release of aircraft for flight, making it the authoritative standard for preflight cleanliness under Part 121. That’s why this option is the best answer. Other regulations cover different topics—pilot responsibilities, certification of small airplanes, or general pilot certificate procedures—and do not establish the clean-aircraft release practice.