CREW ALERTING SYSTEM (CAS)

CREW ALERTING SYSTEM (CAS) WINDOW

• Four message priority levels:

  • WARNING (red): Indicates an emergency or airplane system condition that requires immediate corrective or compensatory crew action.

  • CAUTION (amber): Indicates an abnormal operational or airplane system conditions that require immediate crew awareness and should require a subsequent corrective or compensatory action.

  • ADVISORY (cyan): Indicates operational or airplane conditions that require crew awareness. Subsequent or future crew action may be required.

  • STATUS (white): Indicates information/ status messages.

    • STATUS LINE

  • Selected by using the CCD. Turning the active CCD scroll knobs scrolls the alert message stack list under the CAS window.

  • Indicates the number and type of messages out of the CAS window, and if they are located above or below.

  • Warning messages are not scrolled out of the window.

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ROOT EICAS MESSAGES

• EICAS messages which may generate more messages with them are called Root EICAS messages and they are highlighted by a preceding chevron “>”.

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EICAS MESSAGE INHIBITION

• Some EICAS messages are inhibited on takeoff or approach and landing to prevent it from being a nuisance.