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(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.
Depending on the nature of the message, the system automatically proposes an appropriate
function (Example : WILCO, or AFFIRM, or ROGER).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INFORMATION SYSTEM
CNS/ATM CONTROLS/INDICATORS - DCDU
A330/A340 FLEET DSC-46-55-20 P 2/14
FCOM 19 AUG 10
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 LOG. 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. CAN : Positive answer to an OPEN negotiation message from the ATC (Ex : When
can you.... ?)
14. CANNOT: Negative answer to an OPEN negotiation message from the ATC.
15.
ANSWER
: To split a message, including several questions, into different messages.
16. 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.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INFORMATION SYSTEM
CNS/ATM CONTROLS/INDICATORS - DCDU
A330/A340 FLEET DSC-46-55-20 P 3/14
FCOM 19 AUG 10
(7) Information Field
MSG 1/2
- Displayed, when several messages are available on the MCDU.
- Flashes, when a new message is received.
PG 1/2
- Displayed, when the current message contains several pages.
Miscellaneous Information
SENDING (white) : The current message is being sent.
SENT (white) : The current message was sent.
MONITORING (white) : The FMGS is monitoring the parameter of the current message.
MONIT FAILED (amber) : FMGS monitoring was requested, but failed to start.
MONIT LOST (amber) : FMGS monitoring is lost.
MONIT UNAVAIL
(amber)
: FMGS monitoring is not possible.
MONIT CNCLD (white) : FMGS monitoring is cancelled.
LOADING (white) : The flight plan, or time constraint, contained in the current
message is being loaded in the secondary flight plan of the
FMGS.
LOAD OK (white) : The loading of the flight plan, contained in the current message,
was successful.
LOAD PARTIAL (amber) : The loading of the flight plan, contained in the current message,
was only partially done.
LOAD FAILED (amber) : The loading of the flight plan, contained in the current message,
has failed.
LOAD UNAVAIL (amber) : Loading is not possible.
REMINDER (white) : The current message was automatically recalled by the FMGS.
LINK LOST (amber) : Communication with the ATC is unavailable (displayed on any
message pending when the loss occured).
DOWNLINK LOST
(amber)
: Transmission of a request is unsuccessful.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INFORMATION SYSTEM
CNS/ATM CONTROLS/INDICATORS - DCDU
A330/A340 FLEET DSC-46-55-20 P 4/14
FCOM 19 AUG 10
RESPONSE LOST
(amber)
: Transmission of a reply to an uplink message is unsuccessful.
NO ATC REPLY (amber) : No answer received within 5 min.
WAIT FM DATA (white) : The FMGS is preparing an answer to the ATC’s request for
navigation parameters.
NO FM DATA (white) : The FMGS is unable to provide the ATC-requested parameters.
　
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