TM 1-1510-223-10
CHAPTER 4
MISSION EQUIPMENT
Section I. MISSION AVIONICS
4-1. MISSION CONTROL PANEL.
a.
Description. The mission control panel (fig.
4-1), mounted on the copilot's sidewall, consists of three
sections. The top section contains the mission
caution/advisory annunciator panel. The annunciator
panel incorporates all mission annunciators along with
three aircraft system annunciators (CABIN OVERTEMP,
NO INS UPDATE, and INS UPDATE). The center
section contains a digital DC volt/ammeter, digital AC
volt/frequency meters (2), AC digital load meters (2),
one antenna steering synchronizer control, and the
antenna steering mode selector switch. The bottom
section contains the mission equipment control switches
and the mission equipment circuit breakers.
b.
Mission Control Panel Controls, Indicators,
and Functions.
(1)
Mission annunciator panel. Mission
annunciator panel functions are described in table 2-8.
(2)
Battery voltmeter. A liquid crystal
display indicator placarded VDC, which indicates aircraft
battery voltage.
(3)
Battery ammeter. A liquid crystal
display indicator placarded AMPS, which indicates
aircraft battery current.
(4)
AC volt-frequency meters. Two liquid
crystal display meters, placarded VAC FREQ indicate
the voltage and frequency output of the # 1 and #2
three-phase inverters respectively. The meters indicate
the voltage and frequency of either the A, B, or C phase
of the inverters, depending on the position of the
METERS switch.
(5)
AC loadmeters. Two liquid crystal
display meters placarded AC% LOAD, indicate the load
in percent on the #1 and #2 three-phase inverters
respectively. The meters indicate the load on either the
A, B, or C phase of the inverters, depending on the
position of the METERS switch.
(6)
Data link antenna steering synchronizer
control. Allows manually turning data link antenna to a
desired azimuth with antenna steering mode selector
switch
in
the
MANUAL
or
GROUND
position.
(7)
Data link antenna azimuth indicator.
The data link antenna azimuth indicator is a light
emitting diode display placarded ANT AZIMUTH, which
indicates antenna azimuth in degrees and decimals of a
degree.
(8)
Data
link
antenna
steering
mode
selector switch. The data link antenna steering mode
selector switch, placarded ANT STEERING, AUTO -
MANUAL - GROUND, selects antenna steering mode.
(a)
AUTO.
Selects
automatic
antenna steering mode.
(b)
MANUAL.
Selects
manual
antenna steering mode with a 4° down antenna angle.
MANUAL mode is used for manual antenna steering
while airborne.
(c)
GROUND. Selects manual
antenna steering mode with a level antenna angle.
(9)
Rotating
boom
antenna
operating
position control switch. The rotating boom antenna
operating position control switch, placarded ANT
ORIDE, OPR POS - AUTO, allows overriding antenna
operating position on the ground or automatic operation.
The antenna normally rotates to a vertical position when
the landing gear is retracted and automatically rotates to
a horizontal position when the landing gear is extended.
Moving the switch to the OPR POS allows rotation of
the antenna to the vertical position while on the ground.
(10) Mission equipment control switch. The
mission equipment control switch, placarded MISSION
CONTROL ORIDE - AUTO - OFF controls power to the
mission equipment.
(a)
ORIDE. The ORIDE (override)
position is used to apply AC and DC power to the
mission equipment when one generator has failed and
the aircraft is not operating on external power.
(b)
AUTO. The AUTO (automatic)
position applies AC and DC power to the mission
equipment. Power is automatically removed from the
mission equipment if a generator fails, and the aircraft is
not operating on external power.
(c)
OFF. The OFF position removes
power from the mission equipment.
4-1
