737 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Messages
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11.60.2 D6-27370-866-EGP
FMC Alerting Messages
These messages relate to operationally significant conditions which affect FMC
operation.
FMC alerting messages:
• are shown in the CDU scratchpad
• cause the amber FMC alert light on each pilot’s instrument panel to
illuminate
• illuminate message lights (MSG) on both CDUs.
Use the CLR key or correct the condition responsible for the message to remove
the message. The message is temporarily removed from the scratchpad when
manually entering data. The message returns when the data is removed from the
scratchpad.
ALERTING MESSAGE CAUSE CORRECTIVE ACTION
CRZ ALT CHANGED
TO XXXXX
(U10.5 and later)
An altitude constraint
added due to entering a
new company route, a
new destination airport,
or selection of a new
procedure conflicts with
the cruise altitude,
resulting in
automatically raising the
cruise altitude to match
the highest waypoint
altitude constraint in the
mod plan, when not in
active descent.
Clear the message.
Verify MCP cruise
altitude.
CHECK ALT TGT
(U10.5 and later)
VNAV disengages while
airplane is between MCP
and FMC altitudes or
VNAV button pressed
while airplane is between
MCP and FMC altitudes.
Clear the message.
CUTBACK
DISARMED
(U10.6 and later)
Cutback turned off as a
result of changing or
deleting the flight plan
runway while on the
ground.
Clear the message.
Re-arm as required.
September 26, 2013
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