Menu Page- Description

MCDU MENU KEY - Accesses the MCDU MENU. The active system is indicated in green. All other information is white.

ATC COMM KEY - Accesses the MCDU MENU. The active system is indicated in green. All other information is white.

FMGC - Provides MCDU interface with the FMGC.

ATSU or ACARS - Provides MCDU interface with ACARS or ATSU.

AIDS - Provides MCDU interface with the aircraft integrated data system (AIDS). Normally used by Maintenance.

CFDS - Provides MCDU interface with the centralized fault display system(CFDS). Normally used by Maintenance.

REQ - Displays when the associated system requests to be accessed.

RETURN - Returns the MCDU to the active system.