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• the center CDU tunes the center ILS.
1 VOR
Displays last selected VOR frequency. Tuning status displays as manual (M).
Display is blank on center CDU.
Valid entry is VOR frequency orVOR frequency/course.
Entry tunes related DME frequency.
2 Course (CRS)
Displays selectedVOR course.
Display is blank on center CDU.
110.90 /128`
A L T N
110. 8 0 /0 3 7 `
- - -
M
- - - - - -
S E L E C T
I L S - M L S
1 3 0 4 . 5 B F 0
A D F
C S
1 1 6 . 8 0
V O R
N A V R A D I O
P R E
R
FAILED
BOTH
FMCs
NAV
RAD
1
5
2
3
4
5
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.50.8 D6-30151-425
Flight Management, Navigation -
FMSAlternateNavigationSystem
Description
Valid entry is VOR course or VOR frequency/course.
3 ADF
Displays ADF frequency. Tuning status displays as ANT or BFO.
Displays dashes if no ADF frequency entered on NAV RAD or ALTN NAV RAD
pages after initial power up.
Valid entry is ADF frequency or ADF frequency suffixed with A or B. Suffix may
be changed after entry.
4 ILS
Displays last selected ILS frequency, ILS frequency and course, or PARK.
Valid entries are:
• ILS frequency
• ILS frequency/front course
• front course only (a frequency must already be displayed).
Front course defaults to runway course if runway on active route and only
frequency entered. Otherwise, front course defaults to 000 or the last entered front
course.
Note: If ILS was in autotune at the time of the FMC failure, the frequency and
course are copied to the ALTN NAV RADIO page.
Note: The ILS frequency displaysPARK when no frequency is tuned. Deleting
the ILS frequency parks a tuned ILS.
5 PRESELECT
Allows entry of two separate preselected frequencies and/or frequencies/courses.
Valid entries are any of the entries that can be made on the other lines.
December 01, 1999
747 Operations Manual
Flight Management, Navigation Chapter 11
EICAS Messages Section 60
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.60.1
Flight Management, Navigation EICAS Messages
The following EICAS messages can display.
EICAS Alert Messages
Message Level Aural Condition
>FMC LEFT,
RIGHT
Advisory Affected FMC has failed.
>FMC MESSAGE Advisory High priority FMC message exists.
Message Level Aural Condition
>GPS Advisory Dual GPS failure.
>GPS LEFT,
RIGHT
Advisory GPS sensor fault.
Message Level Aural Condition
ILS ANTENNA Caution Beeper Glide slope or localizer antenna fails to
switch.
>IRS CENTER,
LEFT, RIGHT
Advisory IRU fault detected.
>IRS AC
CENTER, LEFT,
RIGHT
Advisory IRU AC power failure.
>IRS DC
CENTER, LEFT,
RIGHT
Advisory IRU backup DC power failure.
>IRS MOTION Advisory Excessive airplane motion detected during
alignment.
>SNGL SOURCE
ILS
Advisory Both pilots’ displays referenced to the same
localizer or glideslope receiver.
>TRANPONDER
L, R
Advisory Affected ATC transponder has failed.
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.60.2 D6-30151-425
Flight Management, Navigation -
EICAS Messages
EICAS Memo Messages
FMC Messages
FMC messages indicate degraded system operation or data input errors. The
messages are categorized as alert messages and advisory messages.
FMC messages also indicate data link status.
The scratchpad messages display according to their level of importance. A less
important message replaces another message in the scratchpad when the CLEAR
key is pushed or the condition is corrected.
FMC alert messages display the EICAS message FMC MESSAGE. All FMC
messages illuminate the CDU message (MSG) light. Pushing the CLEAR key or
correcting the condition cancels the message.
FMC Alert Messages
ATC COMM ESTABLISHED - ATC COMMavailable or control passed to a new
ATC center.
ATCMSG NOT ACKNOWLEDGED - ATC message has been transmitted and no
network acknowledgment is received.
ATC REPORT LIST FULL - nine reports have been generated and are awaiting
transmission and a tenth report request has been received.
CHECK ALT TGT - VNAV activates when airplane between MCP and FMC
target altitudes. VNAV maintains level flight.
CYCLE IRS OFF-NAV - IRS align problem requires cycling IRS mode switch
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