What should be done if the PMU FAIL light activates?

When the PMU FAIL light activates, referring to the manual for corrective action is the best course of action. This light indicates a fault in the Power Management Unit (PMU), which is essential for engine performance and ensuring safe operation. It is crucial to understand the implications of a PMU failure as it can lead to engine performance degradation or other flight safety issues.

The manual provides specific procedures and guidelines for dealing with the PMU FAIL warning, which may include switching to a backup mode, monitoring engine parameters, or preparing for potential landings, depending on the context of the situation. Following the manual helps ensure that the pilot is responding appropriately to the warning based on established protocols and safety measures.

Continuing to fly without concern, ignoring the warning, or immediately landing without assessing the situation may lead to unsafe conditions or unnecessary emergency procedures. Hence, consulting the manual allows for a measured response to the PMU FAIL light, ensuring both safety and adherence to best practices.