Which indicator lights illuminate when the L/R ENGINE FIRE pushbutton is pressed?

Which indicator lights illuminate when the L/R ENGINE FIRE pushbutton is pressed?

• A. Closes Fuel Firewall shutoff valve
• B. FADEC inhibits ignition
• C. Illuminates "BOTTLE ARMED" switch lights
• D. Disables generator

Answer: (C)

The key idea here is that engine fire pushbuttons arm the fire-extinguishing bottles and provide a clear status indicator. When you press the L/R ENGINE FIRE pushbutton, the extinguishing bottle is armed, and the corresponding “BOTTLE ARMED” switch lights illuminate to show the system is ready to discharge if a fire is detected or if you command a discharge. This illumination specifically communicates that the extinguishing bottles are armed. Other actions that might occur with a fire pushbutton, such as cutting fuel or affecting ignition or generators, are not what the indicator lights show in this case. The lights you’re looking for are the bottle-armed indicators, confirming the extinguishing capability is poised for deployment.

The key idea here is that engine fire pushbuttons arm the fire-extinguishing bottles and provide a clear status indicator. When you press the L/R ENGINE FIRE pushbutton, the extinguishing bottle is armed, and the corresponding “BOTTLE ARMED” switch lights illuminate to show the system is ready to discharge if a fire is detected or if you command a discharge. This illumination specifically communicates that the extinguishing bottles are armed.

Other actions that might occur with a fire pushbutton, such as cutting fuel or affecting ignition or generators, are not what the indicator lights show in this case. The lights you’re looking for are the bottle-armed indicators, confirming the extinguishing capability is poised for deployment.