737 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Messages
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 11.60.37
ACTIVE ADVISORY CAUSE CORRECTIVE ACTION
APM WARN APM status is FAIL or
ABSENT.
Advise maintenance.
CHIMES A chimes suppression
event has occurred.
When selected, this
advisory causes the
CHIMES
SUPPRESSED page to
show.
This advisory clears
when it is selected. The
CHIMES advisory is
then disabled until the
CMU-900 has been
restarted (a power cycle
has occurred).
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
acknowledgement from
the service provider.
Advisory clears when all
VHF messages have
been acknowledged, or
the VHF link fails and
VHF goes to NO
COMM.
September 15, 2016
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