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• clears last scratchpad character
• clears scratchpad message
K
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
. 0 +/-
7 8 9
4 5 6
1 2 3
Z SP
2 4
1
3
CDU
April 01, 2001
747 Operations Manual
Flight Management, Navigation -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.10.7
Push and hold – clears all scratchpad data.
4 Delete (DEL) Key
Push – enters “DELETE” in scratchpad.
CDU Page Components
1 Page Title
Subject or name of data displays on page.
ACT (active) or MOD (modified) indicates whether page contains active or
modified data.
2 Line Title
Title of data on line below.
3 Line
Displays –
• prompts
• data associated with line title
Large font indicates crew entered or verified data. Small font indicates FMC
computed data.
4 Dashes
Data input is optional.
CDU
8
1 0 / 1 5 0 0 F T
F L A P / A C C E L H T
-
1 N M
L E G D I S T
- - - - - - - ` C
A L T / O A T
F L T L V L
S A M P L E P A G E 2 / 4
- 1 2 3 . 4 / A B C D E F
< I N D E X R O U T E >
- - - - - - - - - - - - - - - - - - - - - - - -
0
1
2
3
6
7
5
4
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.10.8 D6-30151-425
Flight Management, Navigation -
Controls and Indicators
5 Scratchpad
Displays messages, alphanumeric entries, or line selected data.
6 Page Number
Left number is page number. Right number is total number of related pages. Page
number is blank when only one page exists.
7 Boxes
Data input is mandatory.
8 Prompts
Display pages and control displays. Caret “<” or “>” is before or after prompt.
FMC Selector
1 FMC Master Selector
L – selects left FMC to provide guidance commands
R – selects right FMC to provide guidance commands.
Note: Switching between FMCs with autothrottle active causes autothrottle to
disconnect.
R
FMC
L
CENTER PANEL
1
April 01, 2001
747 Operations Manual
Flight Management, Navigation -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.10.9
Inertial Reference System (IRS)
Inertial Reference Unit (IRU) Selectors
1 IRU Mode Selectors
IRU mode selector must be pulled out to move from NAV position.
OFF - alignment lost.
ALIGN (alignment)- when parked and momentarily selected:
• initiates alignment
• removes sensor errors when selected from navigation mode
NAV (navigation) -
• system enters navigation mode after completing alignment
• provides IRS information to airplane systems for normal operations
ATT (attitude) -
• system enters attitude move
• position and velocity information lost until system realigned on ground
• requires magnetic heading input from CDU
IRS On Battery Light
OVERHEAD PANEL
NAV
ALIGN ATT
OFF
L
NAV
ALIGN ATT
OFF
NAV
ALIGN ATT
OFF
IRS C IRS R
1
OVERHEAD MAINTENANCE
PANEL
1 ON BAT
IRS
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.10.10 D6-30151-425
Flight Management, Navigation -
Controls and Indicators
1 IRS ON Battery (BAT) Light
Illuminated (white) – IRS operating on backup electrical power (APU hot battery
bus).
April 01, 2001
747 Operations Manual
Flight Management, Navigation -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.10.11
Transponder
Transponder Panel
1 Identification (IDENT) Switch
Push – transmits an identification signal.
2 Transponder (XPNDR) Switch
L or R – selects desired transponder.
3 Transponder Code Selectors
Rotate – Sets transponder code.
4 Transponder Mode Selector
STBY (standby) – transponder not active.
ALT RPTG (altitude reporting) OFF – transponder operates in flight without
altitude reporting.
XNPDR (transponder) - transponder operates in flight with altitude reporting.
TA ONLY (traffic avoidance) and TA/RA (traffic avoidance/resolution advisory)
　
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