Learjet 60 - Exterior Convenience Lights; Recognition Light; Wing Inspection Light

Pilot's Manual
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Learjet 60
RECOGNITION LIGHT
A recognition light is installed on
the upper, leading edge of the verti-
cal stabilizer . The light is
controlled through the RECOG light switch
in the LIGHTS group on the center
switch panel . When the switch is
placed in the On (RECOG)
position, control circuits apply full 28 VDC
from the battery charging bus
to illuminate the light . For greatest
lamp life, it is recommended that the
recognition light be turned OFF
at
altitudes of 18,000 feet or above .
The recognition light operates on
28 VDC supplied through a 20-amp
current limiter .
Some aircraft are equipped with a
pulsating recognition light option .
On these aircraft, the RECOG
light switch has a middle position la-
belled PULSE and a pulse controller
unit . When the switch is placed
in the PULSE position, 28
VDC from the PULSE RECOG LT circuit
breaker is applied to the
pulse controller unit which in turn lights the
recognition light
by delivering pulsating DC current at approximately
45 cycles
per minute . The effect of this pulsating
current
is to cause
the
bulb's
brightness to continually vary between approximately
40%
and 100%
of full bright . This feature results in enhanced aircraft
rec-
ognition and improved bulb life . Also, the
landing lights will pulse
alternately with the recognition
light if the landing gear is down and
locked and the LDG LT switches
are OFF .
On
aircraft with a pulsating
recognition light, a 1-amp PULSE RECOG LT circuit breaker on the
copilot's circuit breaker panel supplies 28 VDC to the pulse controller
unit .
WING INSPECTION LIGHT
For a description of the wing inspection light, refer to Section VI,
ANTI-ICE AND ENVIRONMENTAL .
EXTERIOR CONVENIENCE LIGHTS
(OPTIONAL)
An
exterior convenience lighting option is available which
installs a
light on
the underside of each engine pylon . The lights will
illuminate
the
area around the tailcone baggage compartment
and the single-
point pressure refueling access . The lights are
controlled by the entry
light switch located near the
entry door and are inoperative when the
aircraft is in
flight .
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PM-123
Change 3