Final answer:
The specific voltage at which a GEN 1/2 OVLD (Generator 1/2 Overload) message would be displayed on the EICAS can vary by aircraft type and its electrical system specifications. It is typically higher than standard generator output voltages like 115 VAC or 120 VAC, but without specific aircraft information, the exact triggering voltage is unknown.
Step-by-step explanation:
The generator control unit (GCU) in aircraft systems monitors the electrical output of engine-driven generators. It is tasked with ensuring the system operates within specified parameters. In the context of the EICAS (Engine Indicating and Crew Alerting System), a GEN 1/2 OVLD message would indicate that one of the engine-driven generators is overloaded. While the specific overload voltage threshold can vary by aircraft type and manufacturer, typical values that might trigger such a message often exceed standard operational limits, which are usually well above the nominal voltage of 115 VAC. Therefore, without the specific aircraft model information, it is difficult to determine the precise voltage threshold for the GEN 1/2 OVLD message, but it is likely higher than the common output voltages like 115 VAC or 120 VAC. Maintenance manuals or other technical documentation for the specific aircraft model would provide the exact figures. It's crucial for pilots and maintenance personnel to understand these parameters as they are essential for the safety and maintenance of the aircraft's electrical systems.