What is the main purpose of fire detection systems in an aircraft?

The primary purpose of fire detection systems in an aircraft is to warn the crew of any abnormalities or potential fire. These systems play a crucial role in ensuring the safety of the aircraft and its occupants by providing timely alerts when a fire is detected. Early detection allows the crew to take immediate action to mitigate the situation, such as executing emergency protocols, initiating fire suppression measures, or preparing for an evacuation if necessary. The effectiveness of these systems can significantly reduce the risks associated with in-flight fires, which could lead to catastrophic outcomes.

The other choices, while relevant to various aspects of aircraft operation, do not align with the specific function of fire detection systems. Maintaining cabin pressure, cooling engines, and improving passenger comfort are essential for overall aircraft performance and passenger experience but do not relate to the primary mission of detecting and alerting the crew about potential fire hazards.