After an EICAS Control Panel failure, which buttons remain operative?

In the event of an EICAS Control Panel failure, the buttons that remain operative include the PRI (Primary), STAT (Status), CAS (Crew Alerting System), and STEP buttons. This is crucial for flight safety as these buttons are essential for accessing important information during abnormal situations or system failures.

• The PRI button allows the crew to view primary flight information and systems status, which is vital for understanding the current state of the aircraft.

• The STAT button provides updates on aircraft systems and alerts the flight crew to any status changes.

• The CAS button displays alerts, warnings, and significant information that may require crew attention, ensuring that the crew is aware of critical issues.

• The STEP button is used to cycle through the different messages displayed on the EICAS, allowing for better management of information.

Even though the control panel has failed, retaining access to these functions helps in maintaining situational awareness and managing emergencies effectively. This design choice is made to ensure that vital information is still accessible to the pilots, which is paramount for maintaining safety during flight operations.