Name at least three regulatory parts commonly referenced in AMQS and their typical focus areas.

• A. Part 50 (Aircraft Registration), Part 70 (Certificate of Airmen), Part 99 (Aviation Safety)
• B. Part 21 (Certification and Airworthiness), Part 43 (Maintenance), Part 39 (Airworthiness Directives), Part 145 (Maintenance Organizations)
• C. Part 101 (Unmanned Aircraft Operations), Part 91 (General Operating Rules), Part 73 (Special Flight Permits)
• D. Part 80 (Seizure and Detention), Part 60 (Licensing of Pilots), Part 99 (Aviation Safety)

Answer: (B)

The key idea is that AMQS relies on parts of the regulations that directly govern airworthiness, maintenance, and who may perform it. Part 21 covers Certification and Airworthiness, outlining how aircraft, parts, and related products are designed, produced, and certified as airworthy before and during service. Part 43 deals with Maintenance, including routine and major repairs, alterations, and the required maintenance practices and recordkeeping, which keeps aircraft in a safe, serviceable state. Part 39 focuses on Airworthiness Directives, the mandatory actions issued when an unsafe condition is found, ensuring swift and standardized compliance to mitigate risk. Part 145 specifies Maintenance Organizations, detailing how maintenance providers are approved, staffed, and governed to ensure consistent quality and safety in the work they perform.

Together, these four areas form a practical foundation for understanding how airworthiness is established, maintained, and enforced through regulated processes, which is why they are commonly referenced in AMQS discussions. The other options mix in regulatory parts that address registration, pilot licensing, flight operations, or enforcement in ways that aren’t as central to the maintenance and airworthiness management landscape, so they’re not the best fit for this question.