Which part of the aircraft is primarily protected by the Engine Fire Detection System?

The Engine Fire Detection System is designed specifically to monitor and detect any signs of fire within the engine compartment. This system employs various sensors that continuously check for high temperatures and other indicators of a fire. When such conditions are detected, the system alerts the flight crew, allowing for rapid response to mitigate any potential hazards associated with an engine fire.

The protection of the engine compartment is crucial since it contains essential components that, if compromised by fire, can lead to significant safety risks, including a potential loss of engine power or structural integrity of the aircraft. The other areas listed, such as the passenger cabin, flight deck, and cargo hold, have separate fire detection and suppression systems tailored to their unique conditions and requirements.