(2)
If two or more messages of the same priority are set for display, the one occuring first is displayed until it is cleared, bringing up the next to occur. Messages of differing priorities are stacked for display in the same manner. Clearance of the various messages is normally accomplished by some sort of external clear: pressing the CLR key, or reversion to valid conditions that set the message. Some messages are cleared by the page being changed, which also deletes any of the entries and actions that precipitated the message.
(3)
When a message appears in the scratch pad, of any page, the CDU MSG annunciator light will illuminate. The light will illuminate even if the page on which the message appears is not currently displayed on the CDU.
C. Entry Error Advisory Messages (Fig. 16)
(1)
Entry error advisory messages indicate that an entry of data from the scratch pad into a data field is not correct. The operator must clear the message and repeat the entry in the proper manner. These messages appear only on the CDU on which the data entry attempt was made.
(2)
Display priority and the CDU MSG light operate for the entry error advisory messages the same as for alerting messages.
D. Readiness Advisory Messages (Fig. 17)
(1) Advisory messages indicate system status for readiness of operation, or prediction of profile parameters. These messages appear on the CDU.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
ALERTING MESSAGES___________________ MESSAGE / CONDITION
PASSING LAST ROUTE LEG TERMINATION ____________END OF ROUTE
PUSHED WHILE IN A DISCO FOLLOWED BY A MANUALLY TERMINATED LEG, E.G. FM, VM OR HM LEGS) OR LNAV BUTTON PASSING LAST WAYPOINT PRIOR TO A DISCONTINUITY (EXCEPT WHEN THE WAYPOINT IS _____________DISCONTINUITY
FMC IN IRS ONLY MODE FOR NAVIGATION ____________IRS NAV ONLY
EITHER NOT TUNED OR A VALID SIGNAL IS NOT BEING RECEIVED ________________________NAV INVALID - TUNE XXXXX R NAV OR VOR APPROACH PROCEDURE REQUIRES A SPECIFIC NAVAID BE TUNED AND IT IS
NEXT CLIMB RESTRICTION IN CLIMB PROFILE CANNOT BE MET DUE TO UNDERSHOOT _______________UNABLE NEXT ALT
_____________RESET MCP ALT PASSING TOP OF DESCENT POINT WITHOUT LOWERING MCP ALT WINDOW
_________________INSUFFICIENT FUEL CAUSES THE COMPUTED FUEL BURN TO EXCEED THE TOTAL FUEL IN BOARD A CHANGE IN FLIGHT CONDITIONS OCCURS OR A CHANGE IN THE ROUTE IS MADE WHICH
PROPER LOCALIZER CAPTURE MANEUVER WAS PERFORMED BUT DFCS DID NOT CAPTURE ______________MISSED CAPTURE
PREDICTED TO BE INDETERMINATE AND NOT CORRECTABLE BY FPR WOULD BYPASS MORE THAN ONE WAYPOINT OR THE LATERAL PATH GEOMETRY HAS BEEN A LATERAL DISCONTINUITY HAS BEEN AUTOMATICALLY INSERTED BECAUSE AN IMMINENT FPR ________________________DISCO INSRTD AFTER XXXXX
(USING THE 1-BIT ERROR CORRECTION TABLE) AN ERROR IN THE NAVIGATION DATA BASE HAS BEEN DETECTED AND IS BEING CORRECTED _________________CHECK FLIGHT PLAN
FMCS Alerting Messages
Figure 15 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
ALERTING MESSAGES___________________ MESSAGE / CONDITION
THE DIFFERENCE BETWEEN COMPUTED RADIO POSITION AND FMC POSITION USING IRUs EXCEEDS COMPARISON THRESHOLD _______________VERIFY POSITION
XXXXX/CONSTRAINT BYPASSED_________________________ BYPASSED HAS AN ASSIGNED SPEED OR ALTITUDE CONSTRAINT LATERAL GUIDANCE HAS INSERTED A "FLIGHT PLAN REVISION" AND THE WAYPOINT (XXXXX)
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