Which light on the auto/manual status indicator illuminates when all doors are armed?

Which light on the auto/manual status indicator illuminates when all doors are armed?

• A. AUTO
• B. MANUAL
• C. OFF
• D. BOTH

Answer: (A)

The key idea is understanding how the door arming status is shown. The auto/manual status indicator tells you whether door arming is being done automatically by the system or manually by the crew. When all doors are armed, this means the automatic arming path is in effect, so the AUTO light will illuminate. The Manual light would only come on if doors were armed by a manual action, not automatically. OFF means no arming is active, and BOTH would indicate an abnormal condition where both modes appear lit, which isn’t expected during normal operation. So the AUTO light is the one that lights when all doors are armed.

The key idea is understanding how the door arming status is shown. The auto/manual status indicator tells you whether door arming is being done automatically by the system or manually by the crew. When all doors are armed, this means the automatic arming path is in effect, so the AUTO light will illuminate. The Manual light would only come on if doors were armed by a manual action, not automatically. OFF means no arming is active, and BOTH would indicate an abnormal condition where both modes appear lit, which isn’t expected during normal operation. So the AUTO light is the one that lights when all doors are armed.