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PM-126A 5-45
EICAS DISPLAY
The Engine Indicating and Crew Alerting System (EICAS) is an integrated
digital computer/display system that replaces the majority of
the traditional gauges and warning lights located throughout the cockpit.
The EICAS display (Figure 5-11) is divided into four designated areas:
engine instruments, CAS messages, system display pages and
menu items. The EICAS also incorporates the Crew Warning Panel
(CWP) which provides crew alerting by visual representation while the
cockpit audio system provides the aural alerting. The Crew Alerting
System (CAS) provides the crew with a visual attention getting means
to alert them to a warning that requires immediate action, a caution
alert that requires subsequent pilot or maintenance action, or an advisory
indication that may require pilot or maintenance action at some
point in time. Other airplane system parameters are displayed on the
lower portion of the display via system pages and are selectable by the
bezel controller at the bottom of the DU. Normally, the airplane system
summary page (SUMRY on the menu) is in view, which provides brief
status reports of all sub-systems. Menu selectable, a system schematic
of airplane electrical, hydraulic, environmental control, flight control,
and fuel systems can be individually selected for more detailed monitoring
by the flight crew.
The following CAS illumination is specific to the EICAS display:
28-vdc power is provided from the left essential bus by a 15-amp circuit
breaker DU 2, located on the pilot’s circuit breaker panel (INSTRUMENT/
INDICATIONS group).
CAS Color Description
EICAS CHK Amber Available on MFD display only. EICAS wraparound
monitor.
Pilot’s Manual
5-46 PM-126A
EICAS DISPLAY AND BL-871 BEZEL CONTROLLER
Figure 5-11
DISPLAY CONTROLLERS
The display controllers (two DC-550s), located on the glareshield, provide
immediate access to and control of the objects on the PFDs. Each
controller is configured with seven push buttons located on the front
panel along with two rotary knobs used for reference selection for bearing
source, two concentric knobs for DU dimming and a momentary
push button (located inside concentric DU knob) used to initiate a system
test (Figure 5-12).
The display controllers also provide a data acquisition function, collecting
inputs from sources such as the bezel controllers, guidance controller,
joystick, etc. The controllers pass these inputs to the corresponding
IC-600 for processing.
Pilot’s Manual
PM-126A 5-47
The display controller buttons are as follows:
1. IN/HPA — Inches of mercury or hectopascals.
2. CUE — Selection of single cue or cross pointer command bars.
3. FPA — Controls selection and deselection of the flight path
angle symbol and flight path acceleration display.
4. WX — Select or deselect weather radar display on the PFD.
5. HSI — Provides up to three different display options on the
HSI.
6. FMS — Allows a navigation display of FMS information (alternately
FMS 1 or FMS 2 if dual) to be selected for display on the
PFD.
7. NAV — Alternately selects NAV 1 or NAV 2 as the source of
NAV data on the HSI.
DISPLAY CONTROLLER
Figure 5-12
Each controller contains two rotary bearing source selector knobs that
are used to assign the respective bearing pointers on the HSI or ARC
displays to a particular navigation source.
Power for the display controllers, and the IC-600s, are from the left and
right essential buses and are labeled IC/SG 1 and IC/SG 2 on the pilot’s
and copilot’s circuit breaker panels in the INSTRUMENT/INDICATIONS
group respectively.
DIM
BRG BRG
INBD
DU
OUTBD
DU
ADF PUSH
TO
TEST
NAV
OFF
ADF
NAV
OFF
HSI FMS NAV
FMS
In
hPa
CUE FPA WX
FMS
Pilot’s Manual
5-48 PM-126A
DISPLAY UNIT REVERSION PANELS
A display unit reversion panel is located on the glareshield above the
PFDs on each side of the cockpit. The panel on the pilot’s side is for controlling
the display on DU #2 and the panel on the copilot’s side is for
controlling the display on DU #3. The reversion selector knob on these
panels plus the push function of the knobs allow the operators to
switch the inboard DUs (DU #2 and DU #3) to display either PFD, MFD,
or EICAS formats. With both reversion selector switches in NORM, an
EICAS format is displayed on DU #2 and an MFD format on DU #3. Depressing
the selector knob on either reversion panel flip-flops the
　
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