Final answer:
The EICAS (Engine Instrument and Crew Alert System) replaced older analog instruments and the traditional flight engineer's role by centralizing critical engine and aircraft system information on digital displays in modern aircraft.
Step-by-step explanation:
The Engine Instrument and Crew Alert System (EICAS) is an advanced technology in aircraft systems that replaced older analog instruments and dials. EICAS provides pilots with critical engine and aircraft system information on digital displays, enabling more accurate monitoring and more efficient troubleshooting. It replaced the traditional flight engineer's role, who would manage and monitor engine performance and aircraft systems, alleviating the need for one on the flight deck in modern aircraft. By displaying essential information such as engine performance, fuel quantity, and warnings for system malfunctions, it allows pilots to make informed decisions with a high level of precision. EICAS is part of the movement in aviation towards glass cockpits, where traditional gauges and dials are replaced by multifunction displays showing a wide array of information to the crew.