Which light indicates a potential fire warning condition in the engine fire detection system?

The MASTER WARNING light is specifically designed to alert pilots to critical malfunctions or emergency conditions, such as a potential fire warning in the engine fire detection system. When this light illuminates, it signifies an immediate need for the pilot's attention, indicating that there is a serious issue that requires prompt action, including potential engine fire situations.

This system aims to ensure that pilots can swiftly recognize and respond to severe hazards, thereby enhancing safety. In contrast, while the MASTER CAUTION light does indicate abnormal conditions, it does not denote the same level of urgency as the MASTER WARNING light. The LOOP cue serves to indicate which specific loop within the fire detection system has detected a fault but does not provide a direct indication of a fire danger itself. Similarly, while "All engine loop lights" may indicate a broader issue within the engine fire detection system, they do not convey the same immediate threat as the MASTER WARNING light, which is crucial in emergency scenarios.