In case of a PMU failure, which alert may be triggered?

The MASTER WARN light is designed to provide a universal alert for any critical system failure in the aircraft, including a PMU (Power Management Unit) failure. When the PMU fails, it impacts engine performance and can affect the overall operation of several systems, prompting a warning to the pilot to address the issue immediately.

The MASTER WARN light alerts the pilot to take necessary action as it indicates the presence of abnormal operating conditions that require attention. This is crucial for maintaining flight safety and ensuring that the crew is aware of potential critical issues that could arise during a flight.

While the RPM Indicator light, Torque Indicator light, and Fuel Status light provide specific information related to their respective systems, they do not serve the same broad alerting function as the MASTER WARN light. In the event of a PMU failure, the swift acknowledgment of a MASTER WARN alert is vital for managing the situation effectively.