.
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.
ADVISORY MESSAGE CAUSE CORRECTIVE ACTION
ABOVE MAX CERT ALT The airplane is above its maximum certified altitude. Descend to an altitude below the maximum certified altitude.
APPRCH VREF NOT SELECTED Airplane has transitioned into approach environment and Vref has not been selected on APPROACH REF page. Select Vref on APPROACH REF page.
ARR N/A FOR RUNWAY Runway or approach does not match the selected arrival procedure. Go to the ARRIVALS page and modify selection.
BUFFET ALERT Current conditions result in a maneuver margin less than specified. Bring the airplane back within the operating envelope.
CHECK FMC FUEL QUANTITY The FMC has detected an unexpected drop in the fuel quantity. Check the fuel quantity indications for correctness.
DES PATH UNACHIEVABLE When in path descent and above the path, the FMC predictions show the profile restrictions at the next waypoint cannot be achieved (LNAV remains engaged). Modify the restrictions.
DRAG REQUIRED Airspeed is 10 kts or more above FMC target speed or within 5 kts of Vmo/Vmmo. Use speedbrakes, trim or reduced thrust, as required, to bring the airplane within 5 kts of FMC target speed.
Copyright . The Boeing Company. See title page for details.
September 27, 2004 11.60.13
Flight Management, Navigation -FMC Messages 737 Flight Crew Operations Manual
ADVISORY MESSAGE CAUSE CORRECTIVE ACTION
FMC APP MODE U10.5 and later: The Select an alternate
UNAVAIL–GP approach selected in the FMC does not have a specified glidepath angle for final approach. The FMC approach mode cannot be used for this approach. approach. Clear the message.
INVALID OFFSET Desired offset does not meet FMC offset criteria. Clear the message and amend the entry.
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 Altitude entry on any page Clear the message or
level value) is above the maximum altitude for current selected performance margins. amend the data entry.
MAX MACH .XXX/MIN FMC target speed is greater Change the target speed to
MACH .XXX than the maximum or less within the message limits
OR than the minimum buffet speed for the entered cruise or enter a lower altitude.
MAX CAS .XXX/MIN or step climb altitude.
CAS .XXX
MCP APP DISARM U10.4 and U10.4A: A Clear the message. Change
REQD change in the expected the active flight plan
vertical approach control approach to one that
from glideslope (G/S) to utilizes FMC generated
FMC generated glidepath glidepath. Check that G/S
(G/P) is required. is turned off. Re-arm
approach mode if required.
Copyright . The Boeing Company. See title page for details.
11.60.14 March 28, 2005
Flight Management, Navigation -FMC Messages 737 Flight Crew Operations Manual
ADVISORY MESSAGE CAUSE CORRECTIVE ACTION
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.
NOT ON INTERCEPT HEADING Airplane is not within the LNAV capture criteria for the active leg (LNAV disengages). Manually place the airplane on an intercept heading and reengage LNAV.
OFFSET DELETED The entered start waypoint has been deleted from the flight plan. (lateral offset as installed) Clear the message and amend the route.
OFST ENDS ABEAM XXXXXX An invalid offset leg exists between the end waypoint (XXXXXX) and the start of offset or no end waypoint exists. Clear the message and amend the route.
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