Which statement is true regarding the aircraft's fire warning system?

The fire warning system in the aircraft is designed to monitor a broad range of temperature abnormalities, not just limited to internal engine temperatures. This includes the ability to detect potential fire hazards from sources both internal to the engine and external. By monitoring these variations, the system ensures that any significant changes that could indicate a fire are promptly detected, allowing for rapid response and operational safety.

Other choices do not accurately capture the operational capabilities of the fire warning system. For instance, while component maintenance may be required to ensure the system operates effectively, it is not just a static system that requires no upkeep. Also, the system’s design inherently focuses on temperature changes, both internally and externally, rather than being limited to only internal conditions. Lastly, typically, after a fire warning event, the system does not allow for a manual reset until the underlying cause has been addressed, ensuring that safety is prioritized and any potential fire hazards are not ignored.