Final answer:
In case of an ECAM control panel failure, critical buttons like 'EMER CANC' and 'STBY NAV' remain active, maintaining accessibility to essential flight information for the pilot.
Step-by-step explanation:
If the ECAM control panel (Electronic Centralized Aircraft Monitoring) fails, the system is designed with failsafe features to ensure that critical flight information remains accessible to the pilots. In the event of an ECAM control panel failure, the most critical buttons that remain active are the EMER CANC and the STBY NAV buttons.
These buttons are directly linked to the display management and can still function to assist the pilot in safely operating the aircraft. While the other buttons on the ECAM control panel may become inoperative, the ECAM display on the screens usually reverts to a default status where essential information such as engine parameters and warnings are still displayed.
If the ECAM control panel fails, some buttons may still remain active to ensure basic functionality. These buttons typically include the engine start/stop buttons, emergency stop button, and the on/off switches for critical systems like the fuel pumps and fire detection system.
For example, the engine start/stop buttons allow the pilot to control the engines manually in case of a failure in the ECAM control panel. The emergency stop button serves as a failsafe to immediately shut down all systems in case of an emergency. The on/off switches for critical systems ensure that essential functions like fuel supply and fire detection can still be controlled even if the ECAM control panel fails.