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Which part of FAR requires each certificate holder of an airline carrier to adopt and implement a screening system that detects weapons and explosives in carry-on baggage or on the person of passengers?

  1. FAR Part 121.538

  2. FAR Part 108

  3. FAR Part 107

  4. FAR Part 101

The correct answer is: FAR Part 121.538

Each certificate holder of an airline carrier has to comply with FAR Part 121.538, which specifically states the requirement for adopting and implementing a screening system for detecting weapons and explosives in carry-on baggage or on the person of passengers. The other options listed here refer to different parts of FAR that do not pertain to this specific requirement. FAR Part 108 concerns noise levels, FAR Part 107 pertains to air traffic rules and procedures, and FAR Part 101 is related to banned or restricted items. Therefore, they are not relevant to this question.