Threat level 1 corresponds to which type of behavior?

• A. Physically abusive behavior
• B. Life-threatening behavior
• C. Disruptive Behavior
• D. Attempt or actual breach of the flight deck

Answer: (C)

Threat level 1 is about disruptive behavior—the kind of actions that disturb crew operations but don’t pose immediate physical harm. This includes verbal disrespect, noncompliance with instructions, or other nonviolent disruptions that could escalate if not managed. It’s the lowest level and is addressed through de-escalation and warnings, with crew coordination. It’s not used for physically abusive behavior, life-threatening actions, or a breach of the flight deck, which are higher levels of threat. So the behavior at threat level 1 is disruptive behavior.