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PRINTING (white) : Printing was requested from the DCDUs and printing is in
progress.
PRINT FAILED (amber) : Printing was requested from the DCDUs and printing failed.
PRINTING UNAVAIL
(white)
: Printing was requested from the DCDUs, but the printer is
unavailable.
NO MORE MSG (white) : Follows pressing of the “MSG + “ or “MSG -” key, when no more
messages are accessible.
NO MORE PGE (white) : Follows pressing of the “PGE+” or “PGE-” key, when no more
pages are accessible.
RECALL MODE (white) : Recalls the last stored message.
ANSWER MSG (amber) : Maximum number of pending uplink messages is reached.
FILE FULL (amber) : Maximum number of downlink messages, accessible on the
DCDUs, is reached.
OVERFLW STORED
(white)
: Maximum number of non-pending messages is reached, and a
new non-pending message is registered in the file.
MCDU FOR TEXT
(white)
: Initiation of a negative answer for a pending uplink message.
MCDU FOR EDIT (white) : Follows pressing of the “MODIFY” key.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INFORMATION SYSTEM
CNS/ATM CONTROLS/INDICATORS - DCDU
A330/A340 FLEET DSC-46-55-20 P 5/14
FCOM 19 AUG 10
(8) Message status
(9) Print key
To print the current message.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INFORMATION SYSTEM
CNS/ATM CONTROLS/INDICATORS - DCDU
A330/A340 FLEET DSC-46-55-20 P 6/14
FCOM 19 AUG 10
DATA COMMUNICATION DISPLAY UNITS (DCDU)
Applicable to: ,
(1) Current Message Indication
Displays uplink and downlink messages.
Uplink messages :
Are displayed ‐ on a black blackground.
‐ When received, the message appears in white and the main parameters in blue.
‐ When answered, the message becomes green.
‐ When monitored, the parameters appear in magenta and indicate that they are being
monitored by the FMGS.
‐ When the value is attained, the parameters become green.
‐ When monitoring fails, the parameters become amber.
Downlink messages :
‐ Are displayed in black, on a colored background.
‐ Before sending, the background is blue.
‐ When sent, the background becomes green.
(2) BRT/DIM key
Adjusts the brightness of the DCDU.
(3) ATC Center Identification and Message Reception Time
‐ Identifies the ATC Center
‐ Indicates the time at which the DCDU receives the message from the ATC or the FMGS.
(4) Function Keys
The function keys are only operative, if a star or a prompt is visible.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INFORMATION SYSTEM
CNS/ATM CONTROLS/INDICATORS - DCDU
A330/A340 FLEET DSC-46-55-20 P 7/14
FCOM 19 AUG 10
Depending on the nature of the message, the system automatically proposes an appropriate
function (Example : WILCO, or AFFIRM, or ROGER).
1. WILCO : To accept an ATC clearance.
2. ROGER : To confirm reception, and understanding of an ATC information or report
request.
3. UNABLE : To reject an ATC clearance.
4. AFFIRM : To answer “yes” to an ATC question.
5. NEGATV : To answer “no” to an ATC question.
6. STBY : To inform the ATC that you need to delay the answer.
7. MODIFY : To access the MESSAGE MODIFY or POSITION REPORT page on the
MCDU, in order to modify a message proposed by the FMGS. Also used to
update the parameters that the FMGS provides to the DCDU.
8. CANCEL : To remove a prepared downlink message from the DCDU, or to cancel a
selected reply to an uplink message.
9. SEND : To send a message or an answer, that was prepared by using the other
function keys (Example: WILCO, ROGER, AFFIRMATIVE, STBY...).
10. CLOSE : To erase a message (from the screen) which has been sent to the ATC, or to
erase a message from the ATC which has been answered, and send it to the
MSG RECORD. This is not applicable when the answer is on STBY.
11. RECALL : To recall the last message that was removed from the screen, using the
CLOSE function.
12. LOAD : To load a flight plan from the ATC, or a parameter time constraint, into the
secondary flight plan.
13. CANNOT: Negative answer to an OPEN negotiation message from the ATC.
14. OTHER : To display the other functions that could be applicable to the current
message, but are not currently displayed.
(5) Message Slew Key
To scroll from one message to another.
(6) Page Slew Key
To scroll through the different pages of a message.
(7) Information Field
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INFORMATION SYSTEM
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 4(26)
