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requests from the airline dispatcher. The FMC response in these cases is
completely automatic and no flight crew action is necessary.
Uplinks
Uplinked data may be loaded automatically or may require flight crew action. Two
uplinks automatically load data into the FMC and do not require execution.
Uplinked data that waits in system memory for flight crew action are considered
to be pending.
A pending uplink is included or discarded when the flight crew selects the
applicable prompt. Flight crew response to an uplink depends on the type of
uplink. Flight crew action is made with ACCEPT/REJECT or LOAD/PURGE
prompts, FMC modification ERASE prompt or EXEC key, or when the page with
the uplink is selected. Glareshield–mounted accept and reject switches operate the
same as MFD ACCEPT/REJECT prompts.
Data can be uplinked from the airline dispatcher directly to the PERF INIT,
TAKEOFF REF, DESCENT FORECAST, RTE, ALTN, ALTN LIST, and WIND
pages. The uplinks are annunciated to the crew by the •FMC EICAS
communications alert and a hi–lo chime. The uplink is identified by a CDU help
window message and by the presence of an UPLINK label over the applicable
COMM page prompt.
If there is no active route, wind uplinks are not annunciated, and the <WIND
prompt on the COMM page is not shown.
Requests
A REQUEST prompt on each page downlinks a unique request applicable to that
page. The pages below (as configured by the airline) may contain request prompts.
TRANSMITTED
SELECTION OF REPORT
REPORT BEING
BY GROUND STATION
REPORT
ACKNOWLEDGED
<REPORT <REPORTING <REPORT S E N T
787 Flight Crew Operations Manual
Flight Management, Navigation -
Company Datalink
11.34.4 Boeing Proprietary
Request Status
Below is a typical sequence of status in response to sending a request.
ALTN LIST
RTE DATA
ALTN
RTE
DESCENT FORECAST
<REQUEST PERF INIT
REQUEST>
<REQUEST
T
<REQUEST
<REQUES
<REQUEST
<REQUEST
P E R T I N I T
W I N D D A T A
A L T N L I S
W X R
A L T N
R O U T E
F O R E C A ST
T
<REQUEST TAKEOFF REF
T A K EOF F DATA
SELECTION OF REQUEST
BY GROUND STATION
REQUEST
TRANSMITTED
REQUEST BEING
<REQUEST <REQUESTING <REQUEST S E N T
ACKNOWLEDGED
787 Flight Crew Operations Manual
Flight Management, Navigation -
Company Datalink
Boeing Proprietary 11.34.5
FMC Datalink Uplinks (Accept/Reject)
ACCEPT and REJECT display on the PERF INIT, and ALTN pages after receipt
of uplink data.
Uplink data displays initially in small font for preview.
Select ACCEPT prompt:
• displays uplinked data in large font
• replaces previous data with uplinked data
• changes page to pre–uplink format
• clears CDU help window message
• transmits a downlink accept message (if enabled).
Select REJECT prompt:
• replaces uplinked data with previous data
• changes page to pre–uplink format
• clears CDU help window message
• transmits a downlink reject message (if enabled).
When both ALTN and ALTN LIST uplinks are pending, (2) displays to the right
of UPLINK in the line heading.
The EICAS message •FMC displays whenever any UPLINK message is pending.
FMC Datalink Uplinks (Load/Purge)
LOAD and PURGE display on the DESCENT FORECAST page after receipt of
uplink data. LOAD and PURGE display on the active RTE 1 or RTE 2 page when
there is an uplink to the inactive route.
Select LOAD prompt:
• loads uplinked data into FMC for viewing
• clears CDU help window message
• replaces previous data with uplinked data
• changes page to pre–uplink format
• transmits a downlink accept message (if enabled).
ALTN
PERF INIT
UPLINK
<REJECT ACCEPT>
787 Flight Crew Operations Manual
Flight Management, Navigation -
Company Datalink
11.34.6 Boeing Proprietary
Select PURGE prompt:
• replaces uplinked data with previous data
• changes page to pre–uplink format
• clears CDU help window message
• transmits a downlink reject message (if enabled).
FMC Datalink Uplinks (Load/Exec–Erase)
LOAD displays on the RTE and WIND pages after receipt of uplink data.
After the uplinked data is loaded, the EXEC light illuminates and the ERASE
prompt displays.
Select LOAD prompt:
• loads uplinked data into FMC
• loaded data can be viewed
　
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