When testing the EMER PILOT button, what must be checked in addition to the indicator lights?

When testing the EMER PILOT button, visual confirmation of the lights is essential because it ensures that the system is operating correctly and that the indicator lights are functioning as intended. The indicator lights provide crucial information about the status of the emergency systems and any relevant alerts that the pilot needs to be aware of during critical flight situations. By visually confirming that the lights activate appropriately when the button is pressed, the pilot can validate that the emergency systems are ready and operational.

This step is a part of standard safety and operational checks to ensure that all emergency protocols can be effectively enacted in the event of an incident. Confirmation through visual assessment is a fundamental aspect of operational verification, reinforcing the importance of the system's readiness in maintaining flight safety.