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OFF, then back to NAV.
DESCENT PATH DELETED - VNAV active and all waypoint altitude constraints
defining descent path deleted.
Message Level Aural Condition
UNABLE RNP Advisory Navigation performance does not meet
required accuracy during navigation phases
other than approach.
UNABLE RNP Caution Beeper Navigation performance does not meet
required accuracy during navigation
approach phase.
Message Condition
IRS ALIGN
MODE C, L, R
IRS in align mode. Message no longer
displayed when all IRUs enter navigation
mode.
April 01, 2001
747 Operations Manual
Flight Management, Navigation -
EICAS Messages
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.60.3
DES FORECST UPLINK READY - receipt of an uplink message containing
descent forecast data which passes error checks and is ready to be loaded on the
DESCENT FORECAST page.
DISCONTINUITY - LNAV active and airplane enters route discontinuity. AFDS
maintains last heading.
DRAG REQUIRED - VNAV active and additional drag required or autothrottle off
and less thrust required to maintain descent path.
END OF OFFSET - LNAV active and 5 NM prior to end of active route offset.
AFDS maintains last heading if active route offset overflown.
END OF ROUTE - LNAV active and end of active route overflown. AFDS
maintains last heading.
ENTER IRS POSITION - the flight crew-entered present position did not pass an
IRS comparison check or the IRS is ready to enter the navigation mode and a
present position has not been entered.
FLT NUMBER UPLINK - receipt of an uplink message containing flight number
data which passes error checks and is inserted in the flight plan.
FMC L/R OUTPUT DATA LOSS - some information used by systems other than
the FMS is not available.
FUEL DISAGREE - PROG 2 - fuel totalizer and calculated values disagree by
4,080 Kg or more.
ILS TUNE INHIBITED - MCP - flight control computers inhibiting changes in
ILS tuning, and either a manual operation in the ILS-MLS tuning field attempted
or a new arrival ILS approach activated.
INSUFFICIENT FUEL - estimated fuel at destination less than entered
RESERVES value.
INVALID ATC UPLINK - ATC uplink message received by FMC contains format
or other errors. FMC rejects the uplink and sends a downlink response to ATC
center.
INVALID FLT NO UPLINK - receipt of an uplink message containing route data,
which is at least partially loaded, and flight number data which fails error checks
and is rejected or upon receipt of an uplink message containing only flight number
data which fails error checks and is rejected. FMC sends a downlink response
rejecting the message and explaining why.
INVALID FORECAST UPLINK - receipt of an uplink message containing only
descent forecast data in which all data fails error checks and is rejected, or receipt
of an uplink message containing waypoint wind data which is loaded into the
flight plan and descent forecast data in which all data fails error check and is
rejected. FMC sends a downlink response rejecting the message and explaining
why.
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.60.4 D6-30151-425
Flight Management, Navigation -
EICAS Messages
INVALID ROUTE UPLINK - receipt of an uplink message containing route data
which fails error checks and is rejected. FMC sends a downlink response rejecting
the message and explaining why.
INVALID WIND DATA UPLINK - receit of an uplink message in which all
waypoint wind data is invalid and cannot be loaded into the flight plan. FMC sends
a downlink response rejecting the message and explaining why.
IRS POS/ORIGIN DISAGREE - valid IRS position differs from active origin
airport.
LIMIT ALT FLXXX - VNAV active and cruise altitude greater than VNAV limit
altitude.
MESSAGE LIMIT EXCEEDED - attempted selection of a sixth request of an
ATC request.
NAV DATA OUT OF DATE - clock calendar date exceeds navigation data base
valid (active) calendar cycle.
NAV INVALID-TUNE AAA (AAA = required navaid) - signals not received from
navaid required for approach procedure.
NO ACTIVE ROUTE - LNAV selected, but no active route activated.
PARTIAL CLEARANCE LOADED - FMC was able to load only a portion of the
loadable data in an uplink message. If pilot unable to determine which portion of
the clearance did not load, REJECT the corresponding uplink message.
PARTIAL ROUTE X UPLINK - receipt of a flight plan uplink message containing
route data errors which do not cause total rejection, and part of the route data has
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