of the three phase AC power busses.
(5) Three phase AC external power. External
three phase AC power for operation of the inertial
navigation system or mission equipment can be applied to
the aircraft through an external power receptacle located
on the underside of the left wing just outboard of the
engine nacelle (fig. 2-1). The receptacle is installed
inside the wing structure, accessible through a hinged
access panel. The AC electrical system is automatically
isolated from the external power source if the external
power is over or under voltage, over or under frequency,
or has an improper phase sequence.
(a) Extenal AC power annunciator. The
annunciator placarded EXT AC PWR ON, located on the
mission annunciator panel (fig. 4-1), indicates that
external AC power is connected to the 3 phase busses.
The EXTERNAL POWER annunciator in the advisory
annunciator panel indicates that an AC GPU plug is
mated to the AC external power receptacle.
(b) External AC power control switch.
The switch placarded EXT PWR - RESET - ON - OFF,
located on the mission control panel (fig. 4-1), controls
application of three phase AC power to the aircraft
Section X. LIGHTING
Exterior lighting (fig. 2-32) consists of a navigation
light on the aft end of the aft portion of the vertical
stabilizer, one standard navigation light on the outside of
each wing tip pod; two strobe beacons, one on top of the
horizontal stabilizer (directly above the vertical stabilizer)
and one on the underside of the fuselage section; dual
landing lights and a taxi light mounted on the nose gear
assembly; a recognition light located in the outboard
leading edge of each wing; two ice lights, one light flush
mounted in each nacelle positioned to illuminate along the
leading edge of each outboard wing; and emergency exit
lights aft of the escape hatch and aft of the cabin door.
Navigation Lights. The navigation lights are
protected by the 5-ampere circuit breaker placarded NAV
on the overhead circuit breaker panel (fig. 2-7). Control
of the lights is provided by the switch placarded NAV -
ON, located on the overhead control panel (fig. 2-13).
Strobe Beacons. The strobe beacons are dual
intensity units. They are protected by the 15-ampere
circuit breaker placarded BCN on the overhead circuit
breaker panel (fig. 2-7). Control of the lights is provided
by a switch located on the overhead control panel
placarded BEACON - DAY - NIGHT (fig. 2-13). Placing
the switch in the DAY position will activate the high
intensity white section of the strobe lights for greater
visibility during daylight operation Placing the switch in
the NIGHT position activates the lower intensity red
portion of the strobe lights.
Recognition Lights. The recognition lights are
operated by the two-position switch placarded RECOG,
located in the pilot's subpanel. The lights provide a very
bright, steady illumination. They are protected by a 7.5-
ampere circuit breaker, located on the overhead circuit
breaker panel (fig. 2-7).
Landing/Taxi Lights. Dual landing lights and a
single taxi light are mounted on the nose gear assembly.
The lights are controlled by the switches placarded
LANDING and TAXI, located on the pilot's subpanel. The
landing light circuit is protected by the 5-ampere circuit
breaker placarded LANDING, located on the overhead
circuit breaker panel (fig. 2-7). The taxi light circuit is
protected by a 5-ampere circuit breaker placarded TAXI,
located on the overhead circuit breaker panel (fig. 2-7).
Landing/Taxi lights are automatically turned off when the
landing gear is retracted The landing lights and taxi light
power circuits are protected by 35-ampere and 15-ampere
circuit breakers, respectively, located on the DC power
distribution panel beneath the aisleway forward of the
wing main spar.
Ice Lights. The ice lights circuit is protected by a
5-ampere circuit breaker placarded ICE on the overhead
circuit breaker panel (fig. 2-7). Control of the lights is
provided by a switch placarded ICE - ON on the overhead
control panel (fig. 2-13).
2-76. 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 - ON, located on the overhead
control panel in the COCKPIT LIGHT section (fig. 2-13),
provides overall control for all engine instrument lights,
pilot's and copilot's instrument lights, overhead panel
lights, and subpanel lights. The switch placarded IR
FLOOD ON, located on the overhead control panel (fig. 2-
13), provides overall control for instrument panel,
glareshield, and pedestal extension/cockpit lights.
(1) Utility lights. Two utility lights are located on
the cockpit overhead to provide additional instrument