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scale. The on-side ADRP is used to select this display and set the appropriate value.
An MDA alert displays near the left center of the ADI when the airplane is at the
Minimum Descent Altitude. During the MDA alert the icon flashes yellow.
MDA Pointer
A cyan pointer marks the selected Minimum Descent Altitude on the fine barometric
altitude scale. This pointer appears when the MDA display is selected and the value is
in the display range. This pointer flashes during an MDA alert.
FLIGHT INSTRUMENTS
For Training Purposes Only
Jan 04
11-29
P I LOT T R A I N I N G GU I D E
Decision Height Display
The Decision Height value is selected for display and set by the on-side ADRP. If this
display is selected, it is automatically displayed once the aircraft has descended
through 2500 feet above ground. If Decision Height data becomes invalid, the numeric
values are replaced with red dashes.
A DH alert displays when the airplane is at or below Decision Height. On the right
center of the attitude indicator, DH flashes in yellow, accompanied by the voice alert
“MINIMUMS”.
There is also a DH Pointer which marks the selected Decision Height on the analog
radio altitude scale. This pointer appears when the DH display is selected and the
value is in the display range.
MDA and DH Displays
Figure 11-15
2
R
T
160
140
120
100
20
10
10
20
900
000
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RWY
GPS APPR
ADF1
NO FLIGHT PLAN
29.85 IN
2400M
LNV1 DR VGP
ALTS
AP
FMS1
1
DTK 072
.3
RW07
NM
4
4
2
2
1
1
0.6
129
N
33
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12
E
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3
0
900
MDA 840
M.452
TA
ONLY
430FT
4
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5
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DH 100
MDA
2
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140
120
100
20
10
10
20 300
400
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RWY
ADF1
NO FLIGHT PLAN
29.85 IN
2400M
LOC1 DR GS
ALTS
AP
LOC1
1
CRS 071
.0NM
IOW
4
4
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1
1
0.6
128
N
33
S
15
12
E
6
3
0
900
MDA 840
M.452
TA
ONLY
DH
80FT
3
2
1
DH 102
P604_11_036
0
MDA POINTER DH POINTER
DH Display
DH Alert
“MINIMUMS”
MDA Voice Alert
Alert
MDA
Display
FLIGHT INSTRUMENTS
11-30 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
Vertical Speed Display
The current vertical speed is shown by a green pointer on a vertical white scale; the
green pointer drags a green vertical line from the center of the scale. Vertical speed
(when 200 feet/minute or greater) is numerically repeated at the bottom of the scale
followed by an arrow pointing “up” for climb, or “down” for descent.
The vertical speed is selected by using the VS/Pitch Wheel on the FCP and the
magenta numerical value is displayed at the top of the Vertical Speed scale with a
corresponding up or down arrow as selected.
The FMS Vertical Navigation computer continuously calculates vertical speed
required to reach the next point on the flight plan at the altitude required. The required
vertical speed when greater than 500 fpm for FMS VNAV is displayed on the vertical
speed scale in the form of a cyan circle.
For Precision-Plus-equipped aircraft, the cyan circle will be
displayed if VNAV is selected or VNAV advisory enabled.
TCAS advisories display on the VS scale as green or red lines. A
green line shows a recommended “fly-to” range of vertical
speeds. A red line shows “avoidance” or “exit” vertical speeds.
TCAS modes and messages are also displayed below the VS
scale as appropriate (see Chapter 17 Navigation Systems for
further details).
NOTE
FLIGHT INSTRUMENTS
For Training Purposes Only
Sept 04
11-31
P I LOT T R A I N I N G GU I D E
PFD Vertical Speed Display
Figure 11-16
P604_11_037
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