737 MAX Flight Crew Operations Manual
Flight Management, Navigation
Chapter 11
Company Data Link
Section 33
MN-FLT-OH-201
11.33.1
33 Company Data Link
Company Data Link
File Highlight
Company Data Link
The airplane communications system enables two–way data link 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.
DATA
RECEIVER
AIRLINE OPERATIONS
DATA LINK INFORMATION
CDU
FMC
P/RST
X
X
X
X
X
X
K
N
I
L
P
U
X
X
X
A
E
Y
D
R
CDU
>
T
R
O
P
E
R
N
O
I
T
I
S
O
P
March 1, 2021