.  
PREV PAGE – shows previous page of related pages (for example, LEGS pages)

.
NEXT PAGE – shows next page of related pages.

Execute (EXEC) Key
Push –
.
makes data modification(s) active

.
extinguishes execute light.

Execute Light
Illuminated (white) – active data is modified but not executed.
YD651 - YD655

CDU

CDU Function Keys
Push –
.
INIT REF – shows page for data initialization or for reference data

.
RTE – shows page to input or change origin, destination, or route

.  
DEP ARR – shows page to input or change departure and arrival
procedures

.  
ATC – inoperative (scratchpad message KEY/FUNCTION INOP displayed)

.
VNAV –

.
shows currently active performance page (CLB, CRZ, DES)

.
CLB page is displayed if no active phase exists

Copyright . The Boeing Company. See title page for details.
Flight Management, Navigation -Controls and Indicators 737 Flight Crew Operations Manual

.
FIX – shows page to create reference points on map display

.
LEGS –

.
shows page to evaluate or modify lateral and vertical route data

.
shows page to control PLAN mode display

.  
HOLD – shows page to create holding patterns and show holding pattern data

.
FMC COMM – displays FMC COMM status page.

.  
PROG – shows page to view dynamic flight and navigation data,
including waypoint and destination ETAs, fuel remaining, and arrival
estimates

.
MENU – shows page to choose subsystems controlled by CDU

.
N1 LIMIT – shows page to view or change N1 thrust limits

.  
PREV PAGE – shows previous page of related pages (for example, LEGS pages)

.
NEXT PAGE – shows next page of related pages.

Execute (EXEC) Key
Push –
.
makes data modification(s) active

.
extinguishes execute light.

Execute Light
Illuminated (white) – active data is modified but not executed.
Alpha/Numeric and Miscellaneous Keys
YA613, YA626

Copyright . The Boeing Company. See title page for details.
11.10.8   March 28, 2005

Flight Management, Navigation -Controls and Indicators 737 Flight Crew Operations Manual
YA686 - YK104

Alpha/Numeric Keys
Push –
.
puts selected character in scratchpad

.
Slash (/) key – puts “/” in scratchpad

.  
Plus Minus (+/–) key – first push puts “–” in scratchpad. Subsequent pushes alternate between “+” and “–”.

Delete (DEL) Key
Push – puts DELETE in scratchpad.

Clear (CLR) Key
Push –
.
clears the last scratchpad character

.
clears scratchpad message.

Push and hold – clears all scratchpad data.

Space (SP) Key YA686 - YK104
Push – puts space in scratchpad.
Copyright . The Boeing Company. See title page for details.
Flight Management, Navigation -Controls and Indicators

CDU Page Components
YA721, YA722

YA613 - YA687, YA801 - YK104

Page Title
Subject or name of data shown on page.
ACT (active) or MOD (modified) shows whether page contains active or modified data.

Line Title
Title of data on line below.
Copyright . The Boeing Company. See title page for details.
11.10.10  March 28, 2005

Flight Management, Navigation -Controls and Indicators 737 Flight Crew Operations Manual

Line
Shows –
.
prompts

.
selections
. options

.
data.

Scratchpad
Shows messages, alpha–numeric entries or line selected data.

Page Number
Left number is page number. Right number is total number of related pages.

Boxes
Data input is mandatory.

Dashes
Data input is optional. The data is not mandatory.

Prompts
Show pages, select modes, and control displays. Caret “<” or “>” is before or after prompt.
FMC Source Select Switch YA686, YA687, YC153 - YK104

FMC Source Select Switch
BOTH ON L –
.
selects left FMC for all FMC operations

.
right map will annunciate “FMC L.”

Copyright . The Boeing Company. See title page for details.
　
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