Which statement is true regarding the emergency signaling system and the emergency light switch?

• A. The emergency signaling system is not activated by the emergency light switch
• B. The emergency signaling system is activated by the emergency light switch
• C. The emergency signaling system controls cabin lighting
• D. The emergency signaling system is always active when the door is armed

Answer: (A)

Emergency signaling and emergency lighting operate on separate circuits. The emergency light switch powers the escape-path lighting, exit signs, and related illumination to help people see and evacuate, and it may function independently of the signaling system. The emergency signaling system is designed to alert crew to an emergency and is controlled by its own controls or triggers, not by the emergency light switch. So turning on the emergency lights does not activate the signaling system. The other statements would imply the signaling system controls cabin lighting or is tied to door arming, which is not how these systems are designed to function.