Learjet 60 - Two-Stage Lighting

Pilot's Manual
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Learjet60
CENTER PNUPEDESTAL dimmer switch : The CENTER PNL/PED-
ESTAL dimmer
switch on the pilot's switch panel provides dimming
for the following :
" Autopilot panel
" Standby attitude indicator
Magnetic compass
WING TEMP
indicator
" SPOILER indicator
FLAP indicator
Fuel control panel
Trim switch panel
Passenger briefer panel
Standby airspeed indicator
Standby altimeter
Fuel quantity indicator
HYD PRESS indicator
GEAR & BRAKE AIR indicator
Trim indicators (pitch, roll, yaw)
NOSE STEER switch
HF control head
UNS-1 CDU and ERP panels
Two master
instrument light switches may be installed . They consist of
two INSTR LIGHTS MASTER switches
and the associated aircraft wir-
A ;
One
master
switch
is
located
in the L INSTR LIGHTS
group
0
the
t's switch panel and the other is located in the R INSTR LIGHTS
group on the copilot's switch panel . The WING
INSP LIGHT switch,
normally located on the copilot's switch panel, may be relocated
to a
position on the instrument panel . The INSTR LIGHTS MASTER
switches allow certain cockpit
lighting to be turned on and
off
using
one switch instead of multiple switches
. The following lighting groups
are controlled by the INSTR LIGHTS MASTER switches :
L INSTR LIGHTS
EL PNL
CB PNL
INVER
CENTER PNL/PEDESTAL
R INSTR LIGHTS
"
EL
PNL
" INSTYR
" CB PNL
The individual controls are used to select the brightness level of the af-
fected
instrument
lights and the master switch
is used to turn the light-
ing groups off and on as desired .
TWO-STAGE LIGHTING
Certain lights are automatically dimmed when the NAV light switch is
set to NAV . When the I=
light
switch is set to OFF, full 28 VDC is ap-
plied to t lights allowing them to
illuminate at full brightness . When
the NAV light switch is set to NAV, the voltage agplied to the lights is
reduced to approximately 14 VDC reducing their rightness . The lights
dimmed by the two-stage
dimmers are :
"
Autopilot controller
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* PARK
BRAKE light
" ANTI-SKID lights
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* START lights
"
IGNITION lights
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* Pressurization FAULT/MANUAL light
" Fuel control panel lights *
Pressurization
EMER
DEPRESS light
" SELCAL panel lights
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* CVR TEST & CVR ERASE switches
" EFIS reversionary mode * Landing gear UNSAFE/DOWN lights
lights
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* NOSE STEER ARM annunciator
" LINE ADV switch
4-24
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PM-123
Change 4