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power from the Right Main AC bus to the top anticollision strobe light (and
to the bottom anticollision strobe light for airplanes having ASC 10). For
airplanes not having ASC 10, the ROTATING LTS BEACON relay routes
28V DC power from the Right Main DC bus to the bottom anticollision light.
For all airplanes, the bottom anticollision light (or strobe) will come on
whenever the OUTSIDE BATT switch on the service panel at the rear of the
airplane is turned on. The ßashing anticollision light (strobe) is a reminder
to turn the battery switch off when no longer needed. Power for this
function of the anticollision light (strobe) is 28V DC from the Essential DC
bus for airplanes not having ASC 10, or 115V AC from the Essential AC bus
for airplanes having ASC 10. Additionally, for SN 1034 and SN 1156 and
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS 2A-33-00
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May 30/02
Revision 7
subsequent, operation of the EXTERNAL BATT switch in the service panel
near the nose of the airplane will cause the bottom anticollision light
(strobe) to illuminate.
B. Strobe Lights:
White strobe lights are installed in the tip of the tail cone and at each
wingtip.
The strobe lights are controlled by the STROBE switch on the cockpit
overhead panel depicted in Figure 8. When the switch is selected ON, 28V
DC power from the Right Main DC bus opens the STROBE LT CONT relay
that in turn routes 115V AC power from the Right Main AC bus to the three
strobe lights.
C. Navigation Lights:
A red navigation light is installed in the left (port) wingtip, a green
navigation light in the right (starboard) wing tip, and two white navigation
lights in the aft tail cone (SN 1000-1349) or aft horizontal stabilizer bullet
(SN 1350 and subsequent). On airplanes SN 1000-1155 having ASC 14,
and SN 1156 and subsequent, each wingtip installation is equipped with
dual lights. Regulations require that a navigation light at each position be
operable for dispatch, thus with dual lights, failure of one light will not deter
ßight operations.
The navigation lights are controlled by the NAV switch on the bottom of the
pilot overhead panel. See Figure 8. When the switch is selected to ON,
28V DC power from the Left Main DC bus opens the NAV LTS relay. When
this relay is opened, power is routed from the 28V AC φA NAV / INSP LTS
transformer bus (stepped down from the Left Main 115V AC bus) via the
NAV LTS circuit breaker to the navigation lights.
D. Ice Inspection Lights:
Ice inspection lights are installed on either side of the fuselage and aimed
to provide illumination of the wing leading edges. On airplanes with the
cargo door installation, the right wing ice inspection light is positioned on
the lower aft area of the cargo door. The two lights are controlled by the
ICE switchlight on the pilot overhead panel shown in Figure 8. The lights
are powered by the 28V AC φA NAV / INSP transformer bus (stepped down
from the Left Main 115V AC bus) via the WING INSP LTS circuit breaker.
E. Landing Lights:
Landing lights are installed on each wing in the leading edge at the wing
root fairing. The lights are mounted behind removable clear lens
installations that conform to the curvature of the wing. Each light is
individually controlled with switches labeled L LDG and R LDG on the
overhead EXTERIOR LTS panel. See Figure 8.
Each light has a separate circuit breaker and dedicated relay powered from
a corresponding bus: Right Main 115V AC bus φA for the right light, Left
Main 115V AC bus φB for the left light.
F. Pulse Lights:
Provisions for the Precise Flight Pulselight System are installed on airplane
SNs 1437 through 1454. The provisions consist of the control switch and
necessary wiring. The pulselight system is completely installed on
airplanes 1455 and subsequent.The pulselight control switch is located on
OPERATING MANUAL
2A-33-00 PRODUCTION AIRCRAFT SYSTEMS
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May 30/02
Revision 7
the COP in the EXTERIOR LTS section, and is labeled PULSE.
G. Taxi Lights:
A taxi light assembly, composed of three lights, is mounted on the steerable
portion of the nose landing gear shock strut. The three lights are identical
and interchangeable, but each mounted differently to illuminate a wide area
ahead of the airplane (left, forward, and right). The taxi light control switch,
labeled TAXI (shown in Figure 8), is located in the EXTERIOR LTS section
of the overhead panel. The taxi lights are powered by 28V DC from the Left
Main DC bus, through a TAXI LTS CONTR relay, with each of the three taxi
lights having a dedicated circuit breaker (L TAXI LT PWR, CTR TAXI LT
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湾流4操作手册 Gulfstream IV Operating Manual 2(100)
