The crew-alerting portion of EICAS continually monitors all of the aeroplane systems, and if a fault occurs, or any system fault light illuminates in the cockpit, the EICAS displays a crew- alerting message on the upper CRT. In addition to the display messages, aural tones and Master Warning/Caution lights also indicate crew alerts.

CAUTIONS (LEVEL B)
These are amber, and reflect an operational or aeroplane system condition that requires immediate crew awareness and future compensatory action.

Some examples of Master Caution Failures are:
- Air Bleed System Fault
- Avionics Smoke
- Hot Brakes
- A/Skid Fault
- AC/DC Bus Fault
- Hydraulic System Failure