737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
FMC Messages
11.60.36
MN-FLT-OH-201
INACTIVE ADVISORY
CAUSE
MESSAGE CLEARED
LINK TEST
SUCCESSFUL
Successful data link test
of the communication
medium (VHF,
SATCOM, or HF) has
been completed.
Message clears after ten
seconds.
UTC UPDATED
A UTC Clock Update
message has been
received from the
ground.
Message clears after ten
seconds.
VHF VOICE MODE
The CMU-900 system is
in VHF Voice Mode.
Shows for the duration
that the system remains
in VHF Voice Mode, and
is cleared when the
system returns to Data
Mode.
NO COMM
Neither VHF, SATCOM,
nor HF media have
established a link with
the ground over which a
message may be sent.
Advisory shows for the
duration that the system
remains without a link,
and is cleared when the
system establishes a link.
VHF IN PROG
The system has sent a
downlink message via
VHF and has not yet
received an
acknowledgment from
the service provider.
Advisory clears when all
VHF messages have
been acknowledged, or
the VHF link fails and
VHF goes to NO
COMM.
SATCOM IN PROG
The system has sent a
downlink message via
SATCOM and has not
yet received an
acknowledgment from
the service provider.
Advisory clears when all
SATCOM messages
have been acknowledged
or the SATCOM link
fails.
March 1, 2021
