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time and distance to the next waypoint is also shown here.
The CRZ key shows the cruise modes. Information about
optimum altitude, maximum altitude, step climb savings and
turbulence N1 targets also show.
The DES key shows the descent modes. The end-of-descent
altitude and speed/altitude restrictions show here. Information
about flight path angle, airplane vertical speed and vertical
bearing also show.
The MENU key gives access to other airplane data
communication systems.
The LEGS key shows and accepts input of data about each leg
of the flight plan. Information about heading between the
waypoints, speed and altitude is also shown.
The DEP/ARR key supplies access to a selection of departure
and arrival runways and procedures for the origin and
destination airports.
The HOLD key lets you plan or start a hold at a waypoint or
present position.
The PROG key shows this current flight status information.
The N1 LIMIT key shows the FMC calculated N1 thrust limits for
specific flight phases.
This page also shows the reduced climb thrust limits CLB-1
(Climb 1)and CLB-2 (Climb 2). The flight crew can set N1 limit
data from this page.
The FIX key shows range and bearing data from the present
position to a selected reference position (SRP).
The EXEC key is used to make active or to modify a page with
data entry when the EXEC light comes on.
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Page Select Keys
You push the NEXT PAGE key to advance the display to the next
higher number page. You push the PREV PAGE key to back-up
the display to the next lower number page.
The page strings are continuous. If the first page of a string is
shown (1/9) and you push the PREV PAGE key, the display
shows the last page in the string (9/9). If you go past the last
page in a string (past 9/9 for example), this takes the display
back to the first page in the string (1/9).
Line Select Keys
You use the line select keys for these operations:
* Move data from the scratch pad to a data field
* Copy data from a data field to the scratch pad
* Remove data from a data field
* Select a BITE operation from the maintenance bite index.
Lighted Annunciators
These are the active annunciators:
* CALL
* MSG (Message)
* OFST (Offset).
The CALL light is on when there is a call from another system
other than the FMCS.
The MSG light is on to show there is an alert or advisory
message. The MSG light stays on until you clear the message.
The OFST light is on when a parallel offset is active.
Special Keys
The keyboard has special keys in addition to the alpha-numeric
keys. These are the special keys:
* Change sign (+/-)
* Space (SP)
* Delete (DEL).
* Slash (/)
* Clear (CLR).
The change sign (+/-) and slash (/) keys are standard keys on a
keyboard.
The space key (SP) puts a space into the scratchpad. This will
allow the flight crew to write messages into the scratchpad.
A push of the DEL key puts the word DELETE in the CDU scratch
pad. This lets the operator delete a data field with the line select
key next to the data field. The DEL key does not work when the
scratchpad contains data. Some data fields do not permit the
DEL key function. In this case, the INVALID DELETE message
shows in the CDU scratchpad.
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Push the CLR key once to remove one alphanumeric character
in the scratch pad or an alert or advisory message from the
scratch pad. Hold the CLR key down for one second to remove
all scratch pad data.
BITE
The FMCS BITE function does a check of all key functions.
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-61-00-021
FMCS - CONTROL DISPLAY UNIT - CONTROLS AND DISPLAYS
FMCS - CONTROL DISPLAY UNIT - CONTROLS AND DISPLAYS
EFFECTIVITY
SHZ ALL 34-61-00
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
　
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