(a.) External AC power annunciator
(b.) External AC power control
Light. An annunciator light placarded EXT AC
PWR ON, located on the mission annunciator panel
switch. A switch placarded EXT POWER-OFF-ON-
(fig. 4-1) indicates that external AC power is con-
RESET, located on the mission control panel (fig.
nected to the 3 phase buses. The EXTERNAL
4-l), controls application of three phase AC power
POWER annunciator in the advisory annunciator
to the aircraft.
panel indicates that an AC GPU plug is mated to
the AC external power receptacle.
Section X. LIGHTING
2-76. EXTERIOR LIGHTING.
located below the aisleway floor forward of the main
Description. Exterior lighting (fig. 2-27)
consists of a navigation light on the aft end of the
aft section of the vertical stabilizer, one navigation
light on the outside of each wing tip pod, two strobe
beacons, one on top of the vertical stabilizer and one
on the underside of the fuselage center section, dual
landing lights and a taxi light mounted on the nose
gear assembly, a recognition light located in each
wing tip, and two ice lights, one light flush mounted
in each nacelle, positioned to illuminate along the
leading edge of each outboard wing.
b. Navigation Lights. The navigation lights
are protected by a 5-ampere circuit breaker plac-
arded NAV on the overhead circuit breaker panel
(fig. 2-26). Control of the lights is provided by a
switch placarded NAV-ON on the overhead control
panel (fig. 2-l 2).
c. Strobe Beacons. The strobe beacons are
dual intensity units. They are protected by a 15-
ampere circuit breaker placarded BCN on the over-
head circuit breaker panel (fig. 2-26). Control of the
lights is provided by a switch placarded BEACON -
DAY - NIGHT (fig. 2-12). Placing the switch in the
DAY position will activate the high intensity white
section of the strobe lights for greater visibility dur-
ing daytime operation. Placing the switch in the
NIGHT position activates the lower intensity red
section of the strobe lights.
d. Landing/Taxi Lights. Dual landing lights
and a single taxi light are mounted on the nose gear
assembly. The lights are controlled by switches, plac-
arded LANDING and TAXI, located in the
LIGHTS section of the pilots subpanel. The landing
light circuit is protected by a 5-ampere circuit
breaker placarded LANDING, located on the over-
head circuit breaker panel (fig. 2-26). The taxi light
circuit is protected by a 5-ampere circuit breaker
placarded TAXI, located on the overhead circuit
breaker panel (fig. 2-26). Landing/Taxi lights are
turned off when the landing gear is retracted. The
landing lights and taxi light power circuits are pro-
tected by 35-ampere and 15-ampere circuit breakers,
respectively, on the DC power distribution panel
e. Ice Lights. The ice lights circuit is pro-
tected by a 5-ampere circuit breaker placarded ICE
on the overhead circuit breaker panel (fig. 2-26).
Control of the lights is provided by a switch plac-
arded ICE - ON on the overhead control panel (fig.
2-12). Prolonged use during ground operation may
generate enough heat to damage the lens.
f. Recognition Lights. A switch placarded
RECOG - ON, located in the pilots subpanel
LIGHTS section (fig. 2-6), controls the white recog-
nition light in each wing tip. When requested, this
steady, bright light is used for identification in the
traffic pattern. The recognition lights circuit is pro-
tected by a 7 l/2 ampere RECOG circuit breaker
located on the overhead circuit breaker panel (fig.
2-77. INTERIOR LIGHTING.
Lighting systems are installed for use by the
pilot and copilot. The lighting systems in the cockpit
are provided with intensity controls on the overhead
control panel. A switch placarded MASTER PANEL
LIGHTS - ON, on the overhead control panel (fig.
2-12), provides overall on-off control for all engine
instrument lights, pilot and copilot instrument
lights, overhead panel lights, console and subpanel
lights and the outside air temperature light.
Flight instrument lights. Each individ-
ual flight instrument contains internal lamps for illu-
mination. The circuit is protected by a 7 l/2-ampere
circuit breaker placarded FLT INST on the over-
head circuit breaker panel (fig. 2-26). Control is pro-
vided by two rheostat switches placarded PILOT
INST LIGHTS - OFF - BRT and COPILOT INST
LIGHTS - OFF - BRT on the overhead control
panel (fig. 2- 12). Turning the control clockwise from
OFF turns the lights on and increases their bril-