PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
4-25
Electronic Flight Instrument System (EFIS)
DISPLAYS
Primary Flight Display (PFD)
The PFD is an integrated display of attitude, navigation, and air data
flight information. The PFD is divided into four functional groups shown
in figure 4--19 and described below.
MODE
ANNUNCIATIONS
ADI
DISPLAY
HSI
DISPLAY
AIRSPEED
DISPLAY
ALTITUDE
DISPLAY
VERTICAL
SPEED
DISPLAY
AD--50912@
PFD Functional Divisions
Figure 4--19
D
Mode Annunciations
-- The PFD displays mode annunciations
from the flight guidance system (FGS), HSI source selection, and
comparison monitor functions.
D
ADI (Attitude Director Indicator) Display
-- The ADI symbols use
a truncated sphere format to display standard attitude information.
The attitude display receives its inputs from the AHRS. When either
the pitch or roll data becomes invalid; all scale markings are
removed, the attitude sphere turns cyan, and a red annunciation of
ATT FAIL is put at the top center portion of the sphere.
D
HSI (Horizontal Situation Indicator) Display
-- The HSI heading
display receives its inputs from the AHRS. HSI displays include full
compass, arc, weather radar and navigation information.