RLS -remote light sensor
ROB -right outboard
rst -reset
SDI -source destination identifier
sel -select
SMYD -stall management yaw damper
spd -speed
SSEC -static source error correction
SSM -sign status matrix
sta -station
STD -standard
SWDL -software data loader
TAI -thermal anti-ice
TAS -true airspeed
TAT -total air temperature
TCAS -traffic alert and collision avoidance
system
T/E -trailing edge
terr -terrain
tfc -traffic
thr -thrust
TO -take off
TRA -thrust resolver angle
trk -track
TRU -true
UC -upper center
vib -vibration
vlv -valve
VMO -velocity, maximum operating
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COMMON DISPLAY SYSTEM -- INTRODUCTION
VNAV -vertical navigation
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
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COMMON DISPLAY SYSTEM - INTRODUCTION
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ALTEON PROPRIETARY - Copyright (c) - See title page for details
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CDS -- GENERAL DESCRIPTION Purpose
The common display system (CDS) shows this data to the flight crew:
-Attitude
-Navigation
-Flight mode
-Engine and systems data.
The CDS also is an interface between some airplane systems.
External Interfaces
The computer for the CDS is the display electronics unit (DEU). Many avionic and airframe systems have interfaces 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
-One engine display control panel
-Two EFIS control panels
-Two display source selectors
-Two display electronics units (DEUs)
-Four coax couplers
-Six display units (DUs) that are the same
-Two brightness control panels
737-600/700/800/900 TRAINING MANUAL
-Two remote light sensors (RLSs).
Operation
These are the things that sets the data 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
Two DEUs collect data from many avionic and airframe systems. Each DEU sends the data out on two coax cables. A coax coupler at the end of each coax cable divides the data signal and sends the data to all six display units. The two DEUs send data to all six display units. The DUs have program pins that identify the DU position. The DU position sets what data the DU shows on its display. DU status data goes from each DU to the DEUs on ARINC 429 data busses.
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
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EEC data to other avionic systems.
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MAIN PANEL DUs LOWER DU
NORM
NORM
OUTBD
ENG NDENG MAIN PANEL PRI PFD
UPPER DU BRT PFD INBD
PRI
MFD
OFF OUTBD DU INBD DU LOWER DU BRT BRT BRT
DISPLAY SELECT
MINS FPV MTRS BARO
PANEL (2)
BARO RADIO IN HPA
BRIGHTNESS CONTROL
STD RST
PANEL (2)
MAP 20 40
VOR 2 APP VOR 1 80VOR PLN 10
160
OFF
OFF TFC CTR 5 320
640ADF 1 ADF 2
WXR STA WPT DATA POS TERR ARPT
EFIS CONTROL PANEL (2) RLS (2)
AUTO BRAKE
AUTO AUTO
N1 SET SPD REF
AUTO BRAKE
1
DISARM
BOTH V1 2VR2 1 3
DISPLAYS
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