Boeing 787 KSV Practice Test

Where is the blue master call light that helps identify the source of a passenger service call located?

On the CAP On the Master Attendant Switch On the ACP In the flight deck

Correct Answer:

On the ACP

Explanation:

The blue master call light is part of the passenger call system and is located on the Audio Control Panel. This panel is the crew’s main interface for handling cabin calls and interphone functions, so mounting the indicator here lets the flight attendants quickly see that a passenger has called and identify the source area at a glance. The other panels serve control or routing functions, but the light that identifies the call source is not placed on the Cabin Attendant Panel, the Master Attendant Switch, or in the flight deck. Keeping the indicator on the ACP provides a centralized, immediate cue for responding to passenger service requests.

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