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• Heading data
• Course orientation
• Flight director commands
• Flight path angle
• Weather presentations
• Mode and source annunciations
• Air data parameters
• Engine data
• Fault warning information
• Traffic Alert and Collision Avoidance System (TCAS) (optional)
• Enhanced Ground Proximity Warning System (EPWS) (optional)
The central display system is one of the many systems integrated into
Honeywell’s SPZ-8000 (or SPZ-8400) Digital Automatic Flight Control System and
as such cannot be adequately described in the space available here. For
comprehensive reference material on the central display system, refer to
Honeywell’s SPZ-8000 (or SPZ-8400) Digital Automatic Flight Control System
Pilot’s Manual for the Gulfstream IV. For the purposes of this system description,
the following central display system units and components will be discussed:
• Symbol Generators
• Display Controllers
• Display Units
• Display Power Panel
• Display Unit Cooling
• Display Brightness Panel
• Display Switching and System Control Panel
• Electronic Checklist
2. Description of Subsystems, Units and Components:
A. Symbol Generators:
The three Symbol Generators (SGs) are the principal components of the
central display system. Using ASCB, ARINC (Aeronautical Radio
Incorporated) 429 and/or ARINC 453 data buses, the symbol generators
interface with the other central display system components, flight
management system, flight guidance system and navigation system to
process, organize and display data in the desired format on the selected
display unit. Each symbol generator has an incorporated bus controller
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS 2A-31-00
Page 33
January 31/02
Revision 6
available to govern ASCB as required.
The symbol generators normally drive the display units as shown in the
following table:
DU #: Panel Position: Used As: Normally Driven By:
1 Far Left Pilot’s PFD SG #1
2 Second From Left Pilot’s ND SG #1
3 Upper Center EI Display SG #3
4 Lower Center CAS Display SG #3
5 Second From Right Copilot’s ND SG #2
6 Far Right Copilot’s PFD SG #2
Each symbol generator is powered up when the display units it normally
serves is powered up. If one symbol generator should later fail, the
remaining two operating symbol generators will continue providing the
same displays with no degradation. This prevents a single symbol
generator failure from rendering the central display system inoperative. If
two symbol generators fail, the remaining operating symbol generator will
drive all six DUs simultaneously, however, only four distinct display formats
can be provided. In this case, the copilot’s displays will be a repeat of the
pilot’s displays. In addition, the pilot’s display controller will control central
display system functions. If the pilot’s display controller should fail at this
stage, control would shift to the copilot’s display controller.
B. Display Controllers:
Shown in Figure 17, the two (2) display controllers are used to control the
central display system. The pilot’s display controller is installed in the left
side of the flight panel glareshield; the copilot’s display controller is
installed in the right side. Each display controller contains twenty
pushbuttons, three knobs and a Cathode Ray Tube (CRT) screen. The
twenty pushbuttons (ten function keys and ten line select keys) allow
navigation data and sensor source selection, EFIS and EICAS format
selection, bug setting, test functions and maintenance functions. The three
knobs allow adjustment of menu parameters (SET), barometric pressure
setting (BARO) and CRT screen brightness (BRT).
Each BARO knob is connected directly to the on-side Digital Air Data
Computer (DADC): DADC #1 for the pilot’s side, DADC #2 for the copilot’s
side. When the BARO knob has been turned past its barometric pressure
setting limit, the altitude scale on the PFD will show a red X. Rotating the
knob back to within its limit will remove the red X and return the scale to
normal.
In addition to setting the local altimeter setting for the displayed air data
source, the BARO knob also has a “Push-To-Standard” feature
incorporated. By depressing the PUSH STD portion of the knob, the flight
crew can select and display the numeric value of standard day barometric
pressure (29.92 in Hg or 1013 Mb) or an iconic representation of this value,
“STD”.
　
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