Learjet 60 - Landing Gear Position Lights

Learjet
60

Pilot's Manual
LANDING GEAR POSITION LIGHTS
The
landing gear position lights, consisting of a set of three UNSAFE/
DOWN lights arranged
in a triangular pattern, are located on the
LANDING GEAR control panel to the left of
the LANDING GEAR se-
lector switch . The UNSAFE portion of each
light is red in color and
equipped with dual bulbs . The DOWN
portion of each light is green
in color and equipped with dual bulbs .
The location of each light in
the triangular
arrangement corresponds to the
location of the gear on
the aircraft
. An UNSAFE (red) indication
signifies that the corre-
sponding
gear is not in the down and locked
position or that the cor-
responding main gear
inboard door is open . A DOWN
(green) indica-
tion
signifies the corresponding gear
is down and locked
. During the
gear
retraction sequence, the
three UNSAFE lights will
illuminate
when
the sequence is initiated, remain
illuminated throughout
the re-
traction
cycle, and then extinguish
when the nose gear is up
and
locked
and the main gear inboard
doors close . During the gear exten-
sion
sequence, the three UNSAFE lights
will illuminate when the se-
quence is
initiated, remain illuminated
throughout the extension cy-
cle, and then
extinguish when the nose
gear is down and locked
and
the main gear
inboard doors close . The
lights are operated
by the
same
switches that control the landing
gear extension
and retraction
cycles . The lights are dimmed
when the navigation lights are
on .
The lights may be tested at
any time by depressing the
warning light
test switch (glareshield) or by
using the GEAR function
of the system
test switch . When the system
test switch is used,
all of the landing
gear panel indicator
lights and mute light will
illuminate and the
landing gear
warning horn will sound .
The landing gear
position indicator lights operate
on 28 VDC sup-
plied through the
7 .5-amp WARN LTS circuit
breakers on the pilot's
and copilot's
circuit breaker panels . The position
indicator lights are
operative
during EMER BUSmode . In the
event of a complete DC
electrical failure,
the landing gear position lights
will
be
powered by
the emergency power system
when the EMER BAT 1 Switch
is in the
ON position .
PM-123

3-9
Original