WEATHER RADAR
SYSTEM
The WxR-852 radar system is installed in the
Pro Line 21 King Air C90GTi.
Weather radar controls are located on the dis-
play control panels (DCP). Weather radar dis-
play is shown on the MFD or PFD, depending
on display selections. The weather radar is op-
erated in a split mode with independent radar
scans shown on each PFD.
The following weather radar controls are lo-
cated on the display control panel:
Radar Button
The RADAR line select key controls display
of the weather radar menus on the PFD
(Fig-
ure 16-148).
Figure 16-148. PFD Radar Menu
The following modes are selected with the
MODE line select key and are displayed on
the PFD’s weather radar status field.
Standby Mode (STBY)
The STBY (standby) mode inhibits the radar
transmitter and antenna scan drive. Selecting
STBY or TEST will affect both pilot’s radar
displays. The other three modes (Wx, Wx+T,
or MAP) can be independently chosen. This
STBY mode will automatically be selected 60
seconds after weight on wheels. However,
once on the ground the radar can be turned
ON again by reselecting a desired mode.
Test Mode (TEST)
The system self-test is initiated by selecting the
TEST mode of operation. A test pattern made
up of six rainbow-like arcs show on the dis-
play(s) when the TEST mode is active (Figure
16-149).
Figure 16-149. Test Mode
Map Mode (MAP)
The MAP mode allows the weather radar to
provide the most detailed ground returns. The
signal processing and target display colors are
changed to accentuate ground features. Ground
targets show in cyan, green, yellow, and ma-
genta (Figure 16-150). This mode should not be
used for weather avoidance.
BRT
DIM
300
30.16IN
MIN 200 RA
FMS 1
DTK
301
ICT
4.1
NM
25
301
33
N
W
24
ATC1
UTC
RAT
1200
16:42
- 4
o
C
<
<
17
RADAR
RADAR
<
GAIN
NORM
STBY
WX
MAP
TEST
MODE
Collins
BRT
DIM
10
10
20
HDG
PTCH
ALTS
14
000
6
60
540
20
400
600
700
1
2
4
4
2
1
30.16IN
<
PRESET
FMS
FORMAT >
VOR1
113.85
251
W
30
24
21
ATC1
UTC
RAT
COM1
COM2
121.800
4336
125.250
14:41
15
o
C
<
140
80
60
6935
RDR
TERR
<
ET
10
ACC
-.02
TEST
T+4.0
0
FMS
RADAR ON
TCAS OFF
TFC
>
>
SYNC
CRS 229
5
V
2
V
R
V
1
110
93
93
16-83
FOR TRAINING PURPOSES ONLY
KING AIR C90GTi/C90GTx
PILOT TRAINING MANUAL
16
A
VIONICS
Summary of Contents for C90GTi
Page 5: ......
Page 7: ......
Page 9: ......
Page 11: ......
Page 13: ......
Page 45: ......
Page 47: ......
Page 49: ......
Page 87: ......
Page 89: ......
Page 97: ......
Page 99: ......
Page 101: ......
Page 113: ......
Page 115: ......
Page 117: ......
Page 139: ......
Page 141: ......
Page 193: ......
Page 195: ......
Page 203: ......
Page 205: ......
Page 207: ......
Page 215: ......
Page 217: ......
Page 219: ......
Page 241: ......
Page 243: ......
Page 259: ......
Page 261: ......
Page 263: ......
Page 277: ......
Page 279: ......
Page 281: ......
Page 283: ......
Page 285: ......
Page 311: ......
Page 313: ......
Page 315: ......
Page 323: ......
Page 333: ......
Page 437: ......
Page 439: ......
Page 441: ......
Page 443: ......
Page 467: ......
Page 471: ......
Page 483: ......
Page 485: ......
Page 487: ......
Page 491: ......
Page 493: ......
Page 495: ......
Page 515: ......
Page 517: ......
Page 519: ......
Page 521: ......
Page 547: ......
Page 555: ......
Page 557: ......