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* VOR - very high frequency omnidirectional range
* V/S - vertical speed
* VSI - vertical speed indicator
* wpt - waypoint
* WTAI - wing thermal anti-ice
* WXR - weather radar
* xmtr - transmitter
COMMON DISPLAY SYSTEM - INTRODUCTION
EFFECTIVITY
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COMMON DISPLAY SYSTEM - INTRODUCTION
COMMON DISPLAY SYSTEM - INTRODUCTION
EFFECTIVITY
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Purpose
The purpose of the common display system (CDS) is to supply
navigation and engine information to the flight crew.
External Interfaces
The computer for the CDS is the display electronics unit (DEU).
Many avionic and airframe systems interface with the DEUs.
These systems send ARINC 429, analog, and discrete data to
the DEUs. The DEUs send ARINC 429, analog, and discrete data
to these systems.
Components
These are the components of the common display system:
* Two display select panels
* An engine display control panel
* Two EFIS control panels
* Two display source selectors
* Two display electronics units (DEUs)
* Four coax couplers
* Six identical display units (DUs)
* Two brightness control panels
* Two remote light sensors (RLSs).
Operation
These are the things that determine the information that shows
on the displays units:
* Display unit status
* Display unit location
* Selections made on the control panels and modules.
These are the formats that show on the display units:
* Primary flight display (PFD)
* Navigation display (ND)
* Engine display.
Functional Description
The DEUs collect data from many avionic and airframe systems.
The DEU changes this data into a video signal and sends the
data out on a coax cable. A coax coupler splits the video signal
and sends the data to all six display units. Both DEUs send data
to all six display units.
The DEUs also are the interface between some avionic and
airframe systems. For example, the DEUs receive BITE data
from the electronic engine controller (EEC) and auxiliary power
unit (APU). The DEUs send this data to the flight management
computer. The DEUs also send EEC data to other avionic
systems.
CDS - GENERAL DESCRIPTION
EFFECTIVITY
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CDS - GENERAL DESCRIPTION
CDS - GENERAL DESCRIPTION
EFFECTIVITY
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Component location
These are the CDS components in the flight compartment:
* Left outboard DU
* Left inboard DU
* Right outboard DU
* Right inboard DU
* Upper center DU
* Lower center DU
* Captain EFIS control panel
* First officer EFIS control panel
* Captain display select panel
* First officer display select panel
* Engine display control panel
* Left remote light sensor
* Right remote light sensor
* Captain brightness controls
* First officer brightness controls
* Display source selectors.
The flight management computer system control display units
(CDU) show CDS BITE data.
CDS - FLIGHT COMPARTMENT COMPONENT LOCATION - 1
EFFECTIVITY
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CDS - FLIGHT COMPARTMENT COMPONENT LOCATION - 1
CDS - FLIGHT COMPARTMENT COMPONENT LOCATION - 1
EFFECTIVITY
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Coax Couplers
There are four coax couplers. Coax couplers 1 and 3 are to the
right of the captain rudder pedals. Coax couplers 2 and 4 are to
the left of the first officer rudder pedals.
To get access to the coax couplers, remove the access panel on
　
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