TM 55-1510-215-10
3-19. Pilot's Flight Director Indicator.
(5) Command bar.
The three-dimensional
command bar displays the computed steering
a. Description. The pilot's flight director indicator
commands to intercept and maintain a desired flight
(FDI) (fig. 3-10) combines the attitude sphere display
path. The bar moves up or down to present pitch
with computed steering information to provide the
commands and rotates clockwise or counterclockwise
commands required to intercept and maintain a desired
for roll commands. The command bar will bias out of
flight path.
All guidance commands are depicted
view and ATTITUDE/COMPUTER flags will display,
through the use of a command bar arrangement.
whenever the FD mode is not selected and/or when
Warning flags are provided to indicate invalid attitude or
flight director internal power is inadequate.
computed command displays. Any warning flag in view
indicates that portion of information is unreliable.
(6) Computer flag. When in view, indicates
the system is receiving unreliable flight computer data.
b. Controls and Functions.
(7) Inclinometer.
Provides the pilot a
(1) Roll attitude scale. Displays actual roll
conventional display of aircraft slip or skid. Used as an
attitude through a movable pointer and fixed reference
aid to coordinate maneuvers.
marks.
(8) Attitude flag. When in view, indicates the
(2) Roll attitude pointer. Rotates with attitude
system is receiving unreliable vertical gyro data.
sphere, indicating roll attitude.
(9) Attitude horizon test switch. When the
(3) Decision height annunciator. Illuminates
test switch is pressed, the ATTITUDE and COMPASS
upon reaching altitude selected on the altitude
flags will appear and the pictorial horizon will display a
preselect/alerter.
climbing right turn.
(4) Attitude sphere. Moves with respect to
(10) Symbolic aircraft. Serves as a stationary
the symbolic aircraft reference to display actual pitch and
symbol of the aircraft. Aircraft pitch and roll attitudes
roll attitude.
Pitch attitude marks are in 5-degree
increments on a blue and brown sphere.
1.
RNAV annunciator
2.
Roll attitude scale
3.
Decision height annunciator
4.
Attitude sphere
5.
Command bar
6.
Inclinometer
7.
Attitude horizon test switch
8.
Symbolic aircraft
AP011853
Figure 3-10. Pilot's Flight Director Indicator
3-18 Change 5
