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FMC
ATC VNAV
Z SP
Y
P
HOLD
K
RAD
NAV
MENU
FIX
. 0 +/-
7 8 9
4 5 6
2 3
DEL / CLR
A B C D E
O
J
N
I
M
H
L
F G
Y
T
X
P Q R S
U V W
S
D
L
I
A
F
G
S
M
BRT
T
S
F
O
EXEC
LEGS
NEXT
PAGE
1
PROG
RTE
ARR
DEP
PAGE
PREV
REF
INIT
1
2 2
5
6
7
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.10.4 D6-30151-425
Flight Management, Navigation -
Controls and Indicators
Conventions -
• scratch pad must be blank for line select transfer
• data cannot be transferred to a blank line
• a blank scratch pad cannot be transferred to a line
• not all data can be modified
• message displays if inappropriate entries attempted
3 Display (DSPY) Light
Illuminated (white) – indicates current display is not related to the active leg or
current performance mode.
4 FAIL Light
Illuminated (amber) – indicates fault detected in FMC.
5 Brightness (BRT) Control
Rotate – controls display brightness.
Light sensors located near each CDU measure ambient light level and adjust CDU
brightness to maintain desired illumination.
6 Message (MSG) Light
Illuminated (white) –
• scratchpad displays message
• pushing clear key extinguishes light and clears message
7 Offset (OFST) Light
Illuminated (white) – LNAV gives guidance for lateral route offset.
Function and Execute Keys
1 COMM
FMC
ATC VNAV
HOLD
RAD
NAV
MENU
FIX LEGS EXEC
NEXT
PAGE
PROG
RTE
ARR
DEP
PAGE
PREV
REF
INIT 4
2
3 CDU -152
5
April 01, 2001
747 Operations Manual
Flight Management, Navigation -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.10.5
1 CDU Function Keys
Push –
• INIT REF - displays page for data initialization or for reference data
• RTE - displays page to input or change origin, destination, or route
• DEP ARR - displays page to input or change departure and arrival
procedures
• ATC - displays ATC/ADS STATUS page
• VNAV - displays page to view or change vertical navigation path data
• FIX - displays page to create reference points on ND map
• LEGS -
• displays page to evaluate or modify lateral and vertical route data
• displays page to correlate route waypoints on ND
• HOLD - displays page to create holding patterns and holding pattern data,
or to exit holding pattern
• FMC COMM - displays pages that access datalink, provides datalink
status
• PROG - displays page to view dynamic flight and navigation data,
including waypoint and destination ETAs, fuel remaining, and arrival
estimates
• MENU -displays page to choose subsystems controlled by CDU
• NAV RAD - displays page to view or control navigation radio tuning
2 Previous (PREV) PAGE Key
Push - displays previous page in multiple page displays.
3 NEXT PAGE Key
Push - displays next page in multiple page displays.
1 COMM
FMC
ATC VNAV
HOLD
RAD
NAV
MENU
FIX LEGS EXEC
NEXT
PAGE
PROG
RTE
ARR
DEP
PAGE
PREV
REF
INIT 5
2
3 CDU -161
4
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.10.6 D6-30151-425
Flight Management, Navigation -
Controls and Indicators
4 Execute (EXEC) Key
Push –
• makes data modification(s) active
• extinguishes execute light
5 Execute Light
Illuminated (white) – active data modified but not executed.
Alpha/Numeric and Miscellaneous Keys
1 Alpha/Numeric Keys
Push –
• enters selected character in scratchpad
• Slash (/) key – enters “/” in scratchpad
• Plus Minus (+/-) key – first push enters “-” in scratchpad. Subsequent
pushes alternate between “+” and “-”
2 Space (SP) Key
Push – enters a space in scratchpad when using ACARS or SATCOM.
3 Clear (CLR) Key
Push –
　
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