Copyright . The Boeing Company. See title page for details.
September 27, 2004 11.60.15
Flight Management, Navigation -FMC Messages 737 Flight Crew Operations Manual
ADVISORY MESSAGE CAUSE CORRECTIVE ACTION
RESET MCP APP MODE U10.5 and later: A change in the expected approach is made with an FCC approach mode armed or engaged. Clear and rearm FCC approach mode. Clear the message.
RUNWAY N/A FOR SID The selected runway is not applicable to the selected departure procedure. Clear the message and check selections on the DEPARTURES page. Modify as required.
SELECT ACTIVE WPT/LEG Power–up restart or insertion of a different flight plan while airborne. EXECute a direct–to or leg intercept to tell the FMC which leg of the route is active.
STEEP DESCENT AFTER XXXXXX An excessive vertical discontinuity exists after point XXXXXX. Check routing.
TAI ON ABOVE 10°C Airplane is operating with anti–icing with TAT above +10°C. Clear the message and check the use of anti–icing for engines and/or wings.
UNABLE CRZ ALT FMC predicts that no cruise time is possible at the entered CRZ ALT. Clear the message and review the CRZ ALT selection.
UNABLE MACH .XXX The entered cruise Mach is unattainable based on present gross weight. Select a smaller Mach number or wait until gross weight is reduced sufficiently.
UNABLE TO OFFSET A valid offset cannot be constructed due to geometric limitations. Clear the message and amend the route.
USING RSV FUEL Predicted fuel remaining at DEST is less than the RESERVES entry on the PERF INIT page. Clear the message and change routing if required.
V SPEEDS UNAVAILABLE FMC cannot compute V speeds (as installed) due to unreasonable inputs on the RTE, PERF INIT, or TAKEOFF REF pages. Correct inputs that affect V speed computation.
Copyright . The Boeing Company. See title page for details.
11.60.16 March 28, 2005
Flight Management, Navigation -FMC Messages 737 Flight Crew Operations Manual
ADVISORY MESSAGE CAUSE CORRECTIVE ACTION
VERIFY RNP VALUE When entering an RNP the underlying RNP value is smaller than the manually entered value or the ANP is greater than the manually entered RNP. Change or delete the manually entered RNP.
VERIFY VERT RNP VALUE U10.5 and later: With CDS navigation performance scales enabled, a manually entered vertical RNP is greater than the default vertical RNP or manually entered vertical RNP is less that vertical ANP. Clear the message. Change or delete the manually entered RNP.
XXXX (airport identifier) A REF AIRPORT is entered on the POS INIT page and no entry of ORIGIN yet appears on RTE page 1. Enter the airport identifier on the ORIGIN data line.
XXXXX (MCP altitude value) With the CRZ page displayed, resetting the AFDS MCP altitude to a value different from the CRZ ALT causes the value to appear in the scratchpad. Enter the MCP altitude value on the appropriate target altitude data line.
Copyright . The Boeing Company. See title page for details.
March 28, 2005 11.60.17
Flight Management, Navigation -FMC Messages 737 Flight Crew Operations Manual
FMC Data Link Messages YA613, YA626, YA801 - YA809, YC411 - YD655
These messages relate to FMC data link message status. FMC data link alerting and advisory messages function the same as the alerting and advisory messages described above:
FMC Data Link Alerting Messages
ALERTING MESSAGE CAUSE CORRECTIVE ACTION
ALTN DEST UPLINK An FMC alternate destinations uplink message has been loaded on the ALTERNATE DESTS page, and is ready for flight crew review. (Alternate destinations as installed) Review the alternate destinations uplink.
CRZ WIND UPLINK LOADING An FMC cruise wind uplink message is loading (after LOAD selected on the RTE DATA page). Wait for load to complete.
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