What is the purpose of a master caution light?

The master caution light is a critical warning system in an aircraft's cockpit designed to alert pilots to any system malfunctions or anomalies that require attention. This light serves as an immediate visual cue, prompting pilots to assess the situation and determine if further action is necessary.

While low fuel levels, engine performance issues, and navigation system failures may also trigger specific warnings or lights, those indications are typically separate and more specific to their respective systems. The master caution light is more generalized and covers a wide range of potential issues, making it essential for maintaining safety and operational integrity in flight. Its purpose is primarily to ensure that pilots are aware of any malfunctioning systems so they can diagnose and respond to them promptly.