What does the fire detection and extinguishing system monitor?

• A. AMAD, APU, and engine bays for fires or overheat conditions
• B. The cockpit air quality sensors
• C. External fuel tank vents
• D. Landing gear bays

Answer: (A)

Fire detection and extinguishing systems are aimed at rapidly finding and suppressing fires in the aircraft’s most critical propulsion and power areas. In this Growler, detectors are placed in the engine bays, the AMAD bay (Airframe Mounted Accessory Drive, which houses essential drive and accessory components), and the APU bay. When heat or flame is detected in any of those zones, the system triggers alarms and automatically releases extinguishing agent to suppress the fire and protect the engines, APUs, and related systems.

The other options don’t fit because cockpit air quality sensors monitor the cabin environment, not fire zones; external fuel tank vents and landing gear bays are not the areas this specific fire detection and extinguishing system is designed to monitor and protect.