What occurs when the FAULT/DISC button is pressed on an IDG fault?

Pressing the FAULT/DISC button in response to an IDG (Integrated Drive Generator) fault is a critical action in aircraft systems management. When this button is activated, it triggers the disconnection of the IDG from the electrical system. This is important for safety and operational integrity, as it allows the aircraft to isolate the fault and prevent any further issues that may arise from a malfunctioning generator. Disconnecting the IDG also helps to protect the aircraft's power distribution systems from potential damage caused by an ongoing fault.

This action is a standard procedure that ensures the continued safe operation of the aircraft by rerouting power from alternative sources if necessary. Other options like resetting the whole system, alerting the crew, or powering down the engine are not the specific function of the FAULT/DISC button; they either pertain to different operational protocols or do not directly relate to managing an IDG fault.