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A330/A340 FLEET DSC-22_10-30 P 5/6
FCOM 19 AUG 10
BACK UP NAVIGATION MODE
Applicable to: ALL
The flight crew selects on the MCDU MENU page this degraded mode when both FMGECs have
failed. They recover the navigation function through the MCDU and IRS.
The MCDU continuously memorizes the active flight plan, which was continuously downloaded from
the FMGEC until it failed.
If both FMGECs fail, the back up navigation provides the following functions:
Flight Planning‐
Aircraft position using onside IRS or IRS 3‐
F‐-PLN display on ND
No AP/FD NAV mode‐
Limited lateral revision‐
F‐-PLN automatic sequencing.
Note: MCDU 3 is not able to operate as back up navigation even when it replaces MCDU 1 or
2. The back up navigation mode is only accessible on the MCDU MENU page if the FM
source selector is set to NORM position.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
FMGES MODES OF OPERATION
Intentionally left blank
A330/A340 FLEET DSC-22_10-30 P 6/6
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
PILOT INTERFACE - MANAGEMENT OF THE DISPLAYS
A330/A340 FLEET DSC-22_10-40-05 P 1/2
FCOM 19 AUG 10
GENERAL
Applicable to: ALL
The flight management system displays navigation, performance and guidance information on the:
Multipurpose Control and Display Unit (MCDU)‐
Navigation Display (ND) of the Electronic Flight Instrument System (EFIS)‐
Primary Flight Display (PFD) of the EFIS.‐
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
PILOT INTERFACE - MANAGEMENT OF THE DISPLAYS
Intentionally left blank
A330/A340 FLEET DSC-22_10-40-05 P 2/2
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
PILOT INTERFACE - MCDU
A330/A340 FLEET DSC-22_10-40-10 P 1/14
FCOM 19 AUG 10
MCDU
Applicable to:
MCDU INTERFACE
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
PILOT INTERFACE - MCDU
A330/A340 FLEET DSC-22_10-40-10 P 2/14
FCOM 19 AUG 10
Applicable to:
MCDU INTERFACE
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
PILOT INTERFACE - MCDU
A330/A340 FLEET DSC-22_10-40-10 P 3/14
FCOM 19 AUG 10
Applicable to: ,
MCDU INTERFACE
Applicable to: ,
GENERAL
The Multipurpose Control and Display Unit (MCDU) is a cathode ray tube that generates 14 lines,
of 24 characters each, with:
A title that provides the name of the current page in large letters‐
Six label lines: Each one describes the data displayed slightly below it (on the data field line)‐
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
PILOT INTERFACE - MCDU
A330/A340 FLEET DSC-22_10-40-10 P 4/14
FCOM 19 AUG 10
Six data field lines that display computed data or data inserted by the flight crew‐
The scratchpad line displays:‐
• Specific messages
• Information that the flight crew enters via the number and the letter keys and that they can
then move to one of the data fields.
Applicable to: ,
GENERAL
The Multipurpose Control and Display Unit (MCDU) is a Liquid Crystal Display (LCD) with 14 lines,
of 24 characters each, with:
A title that provi‐des the name of the current page in large letters
Six label lines: Each one describes the data displayed slightly below it (on the data field line)‐
Six data field lines that display computed data or data inserted by the flight crew‐
The scratchpad lin‐e displays:
• Specific messages
• Information that the flight crew enters via the number and the letter keys and that they can
then move to one of the data fields.
Applicable to: ALL
LINE SELECT KEYS
There is a column of line select keys (LSKs) on each side of the screen.
The flight crew uses these keys to:
Move a parameter they have entered in the scratchpad to the appropriate line on the main‐
screen
Call up a specific function page indicated by a prompt displayed on the adjacent line‐
Call up lateral or vertical revision pages from the flight plan page‐.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
PILOT INTERFACE - MCDU
A330/A340 FLEET DSC-22_10-40-10 P 5/14
FCOM 19 AUG 10
Applicable to: ALL
KEYBOARD
The keyboard includes:
Function and Page‐
keys
Call up functions and pages the flight crew uses for flight management
　
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