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TERRAIN switch, located on the overhead panel.
20 20
10 10
GND
PROX
“TOO LOW
TERRAIN”
“TOO LOW
TERRAIN”
DISTANCE TO SELECTED RUNWAY (NM)
4 12 15
RUNWAY 4 NM 12 NM 15 NM
700 AGL
400 AGL
GX_16_073
For Training Purposes Only
Sept 04
16-61
P I LOT T R A I N I N G GU I D E
NAVIGATION
FLIGHT MANAGEMENT SYSTEM (FMS)
The FMS performs the functions of navigation, flight planning and guidance of the
airplane throughout the full flight regime in both Lateral Navigation (LNAV) and
Vertical Navigation (VNAV).
There are two Control Display Units (CDU), located on the pedestal. A third FMS
(optional) can also be installed on the pedestal. The displayed data is shown in the
following colors:
• Cyan (vertical & atmospheric data)
• Green (lateral and index selections)
• Yellow (FROM waypoint)
• Magenta (TO waypoint)
• Orange (flight plan names)
• White (prompts and titles)
FMS DISPLAY UNIT
COMPARE FUEL QUANTITY
0DEPARTURE T.O.INIT0
000ACTIVE FLT PLAN 1/4
PASS/@ LB0
0/170
0055°00154NM
15820 (00+21
0K0P0H0X0001152Z
SJN
0059°00121NM
15820 (00+15 .75M/10000A
CLS
ABQ
0ORIGIN
.75M/10000A
CLS
GX_16_074
Photo Sensor
Line Select
Keys
Scratchpad
Function Keys
Alpha Keypad
Annunciators
Photo Sensor
Line Select
Keys
Brightness
Knob
Numeric
Keypad
Delete Key Clear Key
Function Keys
Infrared Port
P I LOT T R A I N I N G GU I D E
NAVIGATION
16-62 For Training Purposes Only
Sept 04
ANNUNCIATORS
There are six annunciators located at the top of the Control Display Unit (CDU).
White annunciators indicates an advisory annunciation, amber annunciators indicate
an alerting annunciation.
The annunciators are:
• DSPLY (Display) – is lit when the CDU displays:
• A flight plan page other than the first page of the active flight plan
• A stored flight plan page
• Any of the review pages for SIDs and STARs approaches
• A change active leg message
• An intercept waypoint is being defined on the active leg
• DR (Dead Reckoning) – is lit when operating in the DR mode for longer than 2
minutes. The DR mode is defined as the loss of radio updating and all other
position sensors (IRS and GPS)
• DGRAD (Degraded) – is lit when the FMS cannot guarantee the position accuracy
for the present phase of flight due to sensor availability. If the DR annunciator is lit
when DGRAD is lit, DGRAD annunciator goes out. The annunciator is lit if both
of the following conditions are valid:
• The sensors being used to navigate are not approved for the current phase of
flight
• The FMS is the selected navigation source on EFIS
• MSG (Message) – is lit when a message is displayed in the scratchpad. Messages
are displayed in the CDU scratchpad to inform or alert the pilot as to the system
status. The annunciator goes out after the message(s) has been cleared from the
scratchpad. For a list of FMS messages, refer to the Flight Management System
Pilot’s Guide. Messages are divided into two groups:
• Advisory messages – Are usually the result of a pilot action on the CDU
• Alerting messages – Alert the pilot to FMS status
GX_16_075
000ACTIVE FLT PLAN 1/4
Annunciators
INVALID ENTRY
COMPARE FMS POSITIONS
For Training Purposes Only
Sept 04
16-63
P I LOT T R A I N I N G GU I D E
NAVIGATION
• OFFSET (Offset) – is lit when a lateral offset has been entered on PROGRESS
page. The annunciator goes out when the offset is removed
• APRCH (Approach) – indicates that FMS is in the approach mode of operation.
APRCH is lit when all of the following conditions are valid:
• The FMS is the selected navigation source on EFIS
• A nonprecision approach has been activated other than LOC or LOC (BC)
• The airplane position is between 2 NM outside the final approach fix (FAF)
and the missed approach point
• The FMS must be using approved sensors for the selected approach procedure
(VOR/DME, DME/DME, GPS)
• The DGRAD annunciator must be off
BRIGHTNESS CONTROL
Both the manual and automatic (photo sensor) brightness controls are used to increase
or decrease the CRT display brightness. When selected manually, a bright/dim bar is
displayed in the scratchpad. The bright/dim bar level is controlled by pressing BRT or
　
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