曝光台 注意防骗
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the MSG light will still be illuminated. A new entry in the scratch pad overrides
any displayed message. Messages caused by CDU entry errors are displayed
only on the associated CDU; other messages are displayed on both CDUs.
When multiple messages have been generated, they will be stacked for display
in priority sequence, or in the order of their occurrence if of the same priority.
As each message is cleared, the next message in the stack is displayed. Most
messages are cleared with the CLR key on the CDU, or by correcting the
condition. Other messages are cleared by changing the displayed page; this will
delete the entry which caused the message. The following tables list all alerting
messages, their cause, and the recommended corrective action.
ALERTING MESSAGE CAUSE CORRECTIVE ACTION
CHECK FLIGHT PLAN The FMC has found and
corrected an error in the nav
data base.
Check the flight plan and
correct if necessary.
CYCLE IRS OFF–NAV IRS is unable to complete
alignment under current
conditions.
Cycle IRS mode selector to
“OFF” and back to “NAV”.
DATA BASE INVALID The automatic validity test of
the permanent navigation data
base has failed.
Advise maintenance personnel
to check the FMC and reload
the data base, as required. If
desired, consider the use of
the temporary nav data base.
DISCO INSRTD AFTR
XXXXX (waypoint identifier)
A ROUTE DISCONTINUITY
has been inserted into the
flight plan due to undefined
termination of a downpath leg
or a double waypoint BYPASS.
Select the RTE or RTE LEGS
pages and modify the
waypoints for a continuous
route.
DISCONTINUITY Passing the last waypoint in
the route prior to a ROUTE
DISCONTINUITY (LNAV
disengages) or pressing LNAV
while in a discontinuity.
Select the RTE LEGS page.
Enter the desired active
waypoint into the box prompts.
Correct any ROUTE
DISCONTINUITY and
EXECute. Reengage LNAV.
FLT MGMT, NAV
Sec. 2.11 Page 8
Rev. 11/15/02 #41
Continental
737
Flight Manual
ALERTING MESSAGE CAUSE CORRECTIVE ACTION
DUAL FMC OP
RESTORED
Dual FMC operation has been
successfully restored.
Clear message and set FMC
source select switch to
NORMAL.
END OF OFFSET Two minutes prior to passing
offset leg termination.
Confirm ATC clearance.
END OF ROUTE LNAV engaged and passing
the last waypoint in the route
(LNAV disengages).
Select the RTE LEGS page.
Enter the desired active
waypoint into the dash
prompts and EXECute.
Reengage LNAV.
ENTER IRS POSITION IRS in the alignment mode
needs present position to
complete alignment. Previous
present position entry was not
received back from the IRS.
Enter IRS present position into
the scratch pad and line select
4R on the POS INIT page of
the CDU. If present position
was previously entered,
overwrite displayed data. If
necessary, enter present
position directly into the IRS
control /display unit.
INSUFFICIENT FUEL A change in conditions or flight
plan route causes predicted
fuel at destination to be 900
kilograms/2000 lbs or less.
May be the result of a fuel
quantity indicator inoperative.
Modify the route plan or
cruising altitude, or divert for
additional fuel.
Use manual computations of
fuel quantity remaining to
determine gross weight.
IRS MOTION IRS has automatically
restarted the alignment due to
detection of excessive motion.
Clear message and attempt to
reduce aircraft movement, if
practicable.
IRS NAV ONLY The FMC has downmoded to
the IRS-only mode of
navigation or (U7.1+)
navigation accuracy is not
sufficient for present phase of
flight.
Refer to FMC navigation
check on page xxxx.
MAX ALT FLXXX Altitude intervention attempt to
raise cruise altitude when
MCP altitude is above
maximum altitude.
Reset MCP altitude.
MISSED CAPTURE Proper localizer capture
maneuver was performed, but
the AFDS did not capture.
Clear the message manually.
NAV DATA OUT OF DATE Effectivity dates of nav data
base do not agree with date
input from clock.
Check the IDENT page and
reverse the dates for ACTIVE
NAV DATA if required.
737
Flight Manual
Continental
FLT MGMT, NAV
Sec. 2.11 Page 9
Rev. 11/15/02 #41
ALERTING MESSAGE CAUSE CORRECTIVE ACTION
NAV INVALID–TUNE
XXXXX (navaid identifier)
FMC is unable to auto–tune or
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737 FLIGHT MANUAL 737飞行手册1(74)
