What is CAS?
The crew-alerting system (CAS) is used in place of the annunciator panel on older systems. Rather than signaling a system failure by turning on a light behind a translucent button, failures are shown as a list of messages in a small window near the other EICAS indications.
What has changed?
We moved the "acknowledge" key binding from "Q" to the "Scroll Lock" key. In addition, we wired up the scroll lock light to flash with the CAS messages for an immersive effect. Finally, we added "inhibits" to eliminate distractions during the most critical phases of flight (takeoff and landing).