Learjet 60 - Master Caution;Warning and Annunciator Panel Lights

Learjet 60

Pilot's Manual
MASTER CAUTION/WARNING AND
ANNUNCIATOR
PANEL LIGHTS
Master
WARN/CAUT lights on the pilot's and copilot's instrument
panels and annunciator panel
cockpit warning lights give a visual
in-
dication of various systems
operating conditions . The annunciator
panel lights are white (advisory), green
(normal), amber (caution) and
red (warning) .
The annunciator panel
cockpit warning lights may be tested by press-
ing the test switch on either side
of the panel . During the first 3 sec-
onds of the lamp test, the two bulbs in each
light will alternately illu-
minate .
Thereafter, all the bulbs will illuminate
until the test switch is
released .
Photoelectric cells, outboard of each
ENG FIRE PULL
Switch, automatically dim the annunciator panel
lights to a level cor-
responding
to existing light in the cockpit or
to a minimum preset lev-
el for a totally dark cockpit . Other
cockpit annunciator lights are
dimmed when the NAV lights are on .
If an annunciator light
illuminates and the
condition is corrected, the
light will extinguish
. If the condition recurs, the
light will again illu-
minate .
Illumination of
any red cockpit annunciator will cause
both Master
WARN lights to illuminate
and flash . Depressing the
Master WARN/
CAUT light will extinguish
the Master WARN light even
though the
annunciator light may be
flashing (ENTRYDOOR, AFT
CAB DOOR,
L or R STALL, CABIN
FIRE, or either ENG FIRE PULL)
.
Illumination of any amber
cockpit annunciator, except
starter en-
gaged lights (during ground
operations), will cause
both Master
CAUT lights to illuminate and
flash unless the master
caution feature
has
been inhibited . Depressing
the Master WARN/CAUT
light will
extinguish the Master CAUT
light even though the
annunciator light
may be illuminated .
The annunciator light will
remain on as long
as
the condition
exists . When the aircraft is on
the ground, the
master
caution feature may be
inhibited by depressing
and holding
either
Master WARN/CAUT
light until the Master
CAUT light
illuminates
steadily .
Approximately 10 seconds
after takeoff, the master
caution
feature
will revert to the normal
(uninhibited) mode,
Most white annunciators
may be extinguished in
flight by depressing
either Master WARN/CAUT
light . Depressing
either warning lights
Test switch will cause the
annunciators to illuminate
again . A white
ENG
CMPTR light accompanied
byan amber ENG
CMPTR light may
not
be extinguished . Any
white annunciators
which were extin-
guished in flight will again
illuminate shortly after
touchdown .
PM-123

4-35
Change 3