TM 1-1510-218-10
3C-16
(3) EFIS #1 and EFIS #2 Power Switch. The
EFIS #1 / EFIS #2 power switch is a push-button
switch located on the lower left side of the dash panel
beneath the Turn and Slip Indicator. Power is applied
to the pilots display via EFIS #1 switch and power is
applied to the copilots display via EFIS #2 switch.
(4) DME HOLD Switch. The DME HOLD
switch enables the DME hold feature of VHF
Omnidirectional Radio (VOR) 1. The DME HOLD
switch is located on the audio control panel T2 and
right
of
the
FIRE
PULL
handles
on
the
T1. The pilots MFD monitors the DME HOLD switch
and annunciates its position.
(5) COMPASS
1
and
COMPASS
2
Switches. The COMPASS 1 switch is located on the
lower left side of the dash panel under the EFIS #1 /
EFIS #2 switch. The COMPASS 2 switch is located
on the lower right side of the dash panel under the
Vertical Speed Indicator. The compass switches
consist of a gyro FREE / SLAVE switch and an
INCREASE / DECREASE (slew) switch. Selecting
FREE on the FREE / SLAVE switch disengages the
gyro and allows manual slewing of the compass card
via the INCREASE / DECREASE switch. When FREE
is selected, heading validity is ignored. The
COMPASS 1 switches control the pilot side compass
card and the COMPASS 2 switches control the copilot
side compass card. The MFD does not interface with
the slew switches and only annunciates the state of
the FREE / SLAVE switch.
(6) Heading Switch. The Heading Switch is
a three-position switch located on the lower left side of
the dash panel to the right of the COMPASS 1
Switches. This switch allows the selection of Heading
data to be all systems on Compass 1, all systems on
Compass 2, or Normal (pilot on COMPASS 1 and
copilot on COMPASS 2). The MFD provides an
indication when both sides have the same compass
selected.
c. MFD Display Control Panel. The MFD
Control
Panel
provides
integrated
display
management via the controls shown in Figure 3C-5.
Unless otherwise noted the pilots control panel drives
the pilots displays, and the copilots control panel
drives the copilots displays. The pilot can select PFD
on the display control panel when in the reversionary
mode. This makes the top display a PFD without
some of the functions.
Whenever either display fails, it is probable
that functions of that display will also fail.
d. Display Control Panel Controls and
Functions. Listed below are the controls found on the
Control Panel and their corresponding functions.
(1) EHSI Brightness Control. The brightness
control consists of two concentric knobs. The inner
knob controls the brightness of the EHSI (bottom
MFD). Full counterclockwise rotation of the brightness
knob provides the minimum brightness level and full
clockwise rotation is interpreted as the maximum
brightness setting.
(2) EADI Brightness Control. The brightness
control consists of two concentric knobs. The outer
knob controls the brightness of the EADI (top MFD).
Full counterclockwise rotation of the brightness knob
provides the minimum brightness level and full
clockwise rotation is interpreted as the maximum
brightness setting.
(3) CURSOR. The CURSOR control
operates on the Map and Map ARC displays. The
CURSOR joystick moves a crosshair symbol in XY
motion. The bearing and distance to the cursor
symbol is displayed next to the aircraft symbol. The
absolute bearing is in degrees. Any time the cursor is
active, the MFD displays its absolute bearing (north
referenced azimuth) and range in degrees/nm (for
example 273/22) next to the cursor. A dashed line
connects the aircraft symbol and the cursor symbol.
After 30 seconds of no cursor movement, the cursor
bearing and distance information is removed from the
display and the cursor location is reset to a bearing
and distance of zero. The MFD will reset the cursor
back to the aircraft symbol when crosshair time out
occurs, 30 seconds, when the CURSOR RST button is
pressed, or when a different page is selected. The
bearing and distance of the cursor location is sent out
of the pilots bottom MFD to FMS 1. To activate the
MARK function, align the cursor crosshairs over a
desired location such as a waypoint and press the
MARK button on the FMS-800 control.
(4) MFD Test Button. Pressing the MFD
Test button, placarded DU TEST, places both onside
MFD's into diagnostics mode when the current display
page is not a diagnostic page and the aircraft is on the
ground.
The diagnostics page consists of MFD status
information shown as a result of a Built-In-Test (BIT).
The diagnostic display page is only active while the
aircraft is on the ground and the Weight On Wheels
(WOW) discrete is set.
WARNING