737 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Messages
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11.60.20 D6-27370-866-EGP
ADVISORY MESSAGE CAUSE CORRECTIVE ACTION
KEY/FUNCTION INOP A mode key is pressed
for which an FMC
function has not been
implemented or has not
been enabled. (FANS
MCDU only)
Clear the message or
select another CDU page
for display.
LOC CAP ACTIVE The airplane is
approaching its turn onto
the localizer or GLS
course and will maintain
an intercept heading.
Clear the message
manually, or wait for the
AFDS to signal reset
status to the FMC.
LOC CAP
CANCELLED
Flight plan modifications
or the airplane condition
did not facilitate
localizer capture.
Clear the message
manually, or wait for the
AFDS to reset to LOC
CAP ACTIVE.
MAX ALT FLXXX
(flight level value)
Altitude entry on any
page is above the
maximum altitude for
current selected
performance margins.
Clear the message or
amend the data entry.
MAX MACH
.XXX/MIN MACH
.XXX
OR
MAX CAS .XXX/MIN
CAS .XXX
FMC target speed is
greater than the
maximum or less than
the minimum buffet
speed for the entered
cruise or step climb
altitude.
Change the target speed
to within the message
limits or enter a lower
altitude.
NO DES PATH AFTER
XXXXX (waypoint)
FMC is unable to
construct a PATH DES
that satisfies all altitude
restrictions after
XXXXX.
Modify speed or altitude
restrictions on the RTE
LEGS pages.
September 15, 2016
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