earlier.
Figure 16-143. CDU ADF Page
Ground Communications Power
When the Battery Bus switch is in the normal
position, the ground communications electric
bus provides electric power directly from the
main aircraft battery when selected by the
pilot. Control of the system consists of a push
on/push off solenoid-held annunciator switch
labeled GND COM and is located on the re-
versionary panel (Figure 16-144). Selection
provides operation of COM 1 through the
RTU utilizing the headsets or the hand mic
and cockpit speakers. No other radios are
available during ground comm operations. An
“ON” annunciation will illuminate when
ground comm has been selected and extin-
guish when deselected.
Subsequent activation of the main battery
switch will result in an automatic disconnect
of the ground communications bus from the
com system; however, the normal method for
deactivation of the system is accomplished by
pressing the GND COM switch. This switch
does not have a timer and will remain selected
unless turned off, or the battery is turned on,
or the Battery Bus switch is turned off.
Figure 16-144. GND COMM Button
Static Discharging
A static electrical charge builds up on the sur-
face of an airplane while in flight and causes
interference in radio and avionics equipment
operation. The charge is also dangerous to per-
sons disembarking after landing, as well as to
persons performing maintenance on the air-
plane. Static wicks (Figure 16-145) are in-
stalled on the training edges of the flight
surfaces and the wing tips and assist discharg-
ing of the static electrical charge.
Figure 16-145. Static Wicks
EXEC
NEXT
PREV
MFD
DATA
MFD
ADV
CLR
DEL
BRT
DIM
DEP
ARR
PERF
LEGS
FPLN
DIR
MSG
TUN
IDX
MFD
MENU
A B C D
F G
H I J K L M
O P Q R
T U
V
X Y Z
SP
/
E
N
S
W
1 2 3
4 5 6
7 8 9
+ -
/
0
/
ADF CONTROL
404.0
ADF
BFO
MODE
[
[
280.0
ON/
OFF
TEST
390.0
/
304.0
404.0
1
ADF
/
ANT
/
2
/
/
/
/
/
/
1/5
3
4
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ADF PRESETS
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##
/
/
FOR TRAINING PURPOSES ONLY
16-80
KING AIR C90GTi/C90GTx
PILOT TRAINING MANUAL
16
A
VIONICS
Summary of Contents for C90GTi
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