Final answer:
The EICAS system will display several indications in case of an engine out condition, including a change in display colors and alerts such as 'ENG OUT' or 'L/R ENG FAIL'. An audible alert may also occur, guiding pilots to follow specific safety procedures as per the aircraft's flight manual.
Step-by-step explanation:
The Engine Indicating and Crew Alerting System (EICAS) is a key component of modern aircraft designed to display vital engine and other aircraft system information to the flight crew. In the case of an engine out condition, where the engine's N2 (also commonly referred to as NG for some engine types) falls to 55 or below, the EICAS will typically display several indications. These indications can include a change in the engine display parameter colors, often accompanied by caution or warning messages such as "ENG" followed by a number representing the affected engine, "ENG OUT", or possibly "L/R ENG FAIL" depending on the specific aircraft and its systems.
Furthermore, there may be an audible alert, and other system parameters that are out of their normal operating range might be highlighted or presented alongside the main engine out indication. Pilots are trained to respond to these EICAS indications by performing specific procedures outlined in the aircraft's flight manual to safely manage the situation.