Three phase inverter control switch. A
three position switch placarded No.1 MSN OFF No.2
MSN INV, located on the mission control panel (fig. 4-
1), controls three phase inverter operation.
Three phase volt/frequency meter. A three
phase volt/frequency meter, mounted on the mission
control panel (fig. 4-1). monitors output of the selected
three phase inverter. Frequency (Hz) is normally
displayed on the meter. To read voltage, press the
button located in the lower left corner of the meter.
Each of the three phases is monitored individually by
election on the mission AC volt frequency and load
Three phase loadmeter A three phase
loadmeter mounted on the mission control panel (fig.
4-1 ). monitors inverter output level. Each of the three
phases is monitored individually by selection of the
mission A(' volt frequency and load selector switch.
Three phase A C off annunciator light. An
indicator light placarded 30 AC OFF, located on the
misson annunciator panel (fig. 4-1),
indicates that three phase AC power is not being
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 leading edge
just outboard of the engine nacelle (fig. 2-1). The
receptacle is installed inside the wing structure and is
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.
Light. An annunciator light placarded EXT AC PWR
ON, located on the mission annunciator panel (fig. 4-1),
indicates that an AC GPU plug is mated to the AC
external power receptacle.
External AC power control switch.
A switch placarded AC EXT POWER, located on the
mission control panel (fig. 4-1), controls application of
three phase AC power to the aircraft.
Section X. LIGHTING
2-75. EXTERIOR LIGHTING.
Description. Exterior lighting (fig. 2-28)
consists of a navigation light on the top of the aft section
of the vertical stabilizer, one navigation light on top and
bottom 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, one 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.
Navigation Lights. The navigation lights are
protected by a 5-ampere circuit breaker placarded NAV
on the overhead circuit breaker panel (fig. 2-27).
Control of the lights is provided by a switch placarded
NAV-ON on the overhead control panel (fig. 2-12).
Strobe Beacons. The strobe beacons are dual
intensity units. They are protected by a 15 ampere
circuit breaker placarded BCN on the overhead circuit
breaker panel (fig. 2-27). 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
during daytime operation. Placing the switch in the
NIGHT position activates the lower intensity red section
of the strobe lights.
Landing/Taxi Lights. Dual landing lights and a
single taxi light are mounted on the nose gear assembly.
The lights are controlled by switches, placarded
LANDING and TAXI, located in the LIGHTS section of
the pilot's subpanel. The landing light circuit is
protected by a 5-ampere circuit breaker placarded
LANDING, located on the overhead circuit breaker panel
(fig. 2-27). The taxi light circuit is protected by' a 5-
ampere circuit breaker placarded TAXI, located on the
overhead circuit breaker panel (fig. 2-27). Landing/Taxi
lights are turned off when the landing gear is retracted.
The landing lights and taxi light power circuits are
protected by 35ampere and 15-ampere circuit breakers,
respectively, located on the DC power distribution panel,
beneath the cockpit floor.
Ice Lights. The ice lights circuit is protected by
a 5-ampere circuit breaker placarded ICE on the
overhead circuit breaker panel (fig. 2-27).
Change 2 2-68