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valid autopilot roll and/or pitch mode.
Refer to Chapter 11, Section 50, Alternate Navigation System Description, for
additional information.
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Air Traffic Control Datalink Section 33
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11.33 Flight Management, Navigation-Air Traffic Control Datalink Air Traffic Control Datalink
Most Air Traffic Control datalink functions are accomplished on the MFD. The
multi-function keyboard is used as an input device for downlink message forms.
Uplink messages which contain route modifications are loaded into the FMC
using the LOAD FMC function on the MFD ATC page. Execution of an ATC
loaded modification is accomplished using normal FMC modification procedures.
Refer to Chapter 5, Section 40, MFD Communications, for a description of ATC
datalink.
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11.34 Flight Management, Navigation-Company DatalinkCompany Datalink
The airplane communications system enables two–way datalink communications
between the FMC and airline operations. A downlink occurs when data is
transferred from the FMC and transmitted through the airplane communications
system to a receiver on the ground. Data may be downlinked from the FMC either
manually or automatically. An uplink is the opposite of a downlink; data is
transmitted from a ground station for input to the FMC. Data may be uplinked at
the discretion of the airline operations dispatcher or in response to a downlink
request.
CDU CDU EICAS
HELP
WINDOW
HILO
CHIME
FMF
FLIGHT
MANAGEMENT
FUNCTION
CMF
COMM
MANAGEMENT
FUNCTION
FDCF
FLIGHT DECK
COMM
FUNCTION
DISP
DISPLAYS
FUNCTION
VHF
DATA
RECEIVER
AIRLINE OPERATIONS
DATALINK DATA
787 COMMON CORE SYSTEM
FMC
FMC COMM
UPLINK
XXXX
XXXX UPLINK
MESSAGE TEXT
CLEAR
MSG
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Datalink
Downlinks are datalink messages transmitted to a ground station. Requests for
data and reports of FMC data are two types of downlinks. Requests are made
manually by the flight crew. Reports can be made manually or may occur
automatically.
Uplinks are messages transmitted to the airplane. Most uplinks require manual
selections by the flight crew. Some uplinks are input automatically.
Manual Downlinks
Select a REQUEST prompt to start the downlink request for data. REQUEST
prompts are on PERF INIT, DESCENT FORECAST, RTE, ALTN, ALTN LIST
or RTE DATA pages. Downlink reports of the active route may be accomplished
by selection of the REPORT prompt on the RTE page and a position report may
be downlinked by selection of the REPORT prompt on the POS REPORT page.
When the communications function is unable to prepare FMC downlinks, the
words FAIL, NO COMM, or VOICE display on the CDU pages in place of the
REQUEST and REPORT prompts. The datalink status also displays on the FMC
COMM page. Radios supporting datalink operations can be reconfigured by the
crew through the MFD COMM function; refer to Chapter 5, Section 40,
Command Key Functions, for additional information. The status messages are:
• FAIL –
• the data communications management function is inoperative, or
• the data radios have failed.
• NO COMM –
• the data radios are operational but, not available
• VOICE – all available radios are operating in the VOICE mode.
Reports
A REPORT prompt on each page downlinks a unique report applicable to that
page. The pages below contain report prompts.
Report Status
Below is a typical sequence of status in response to sending a report.
<REPORT RTE POS REPORT
RO U TE
REPORT>
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Automatic Downlinks
The FMC can be configured by the airline to automatically transmit downlinks of
FMC data at predetermined points during the flight or in response to specific data
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