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* Ground proximity warning computer (GPWC)
* Weather radar (WXR) transceiver.
Two buses are used to isolate the barometric correction data
that goes to the individual air data inertial reference units.
The CP Feedthru buses have this data:
* V speeds (V1, Vr, and Vref)
* Selected speed bug
* Selected gross weight
* Set landing altitude
* Barometric correction
* Selected range
* Selected baro minimums
* Selected radio minimums
* CDS EFIS CP modes 1 discrete word
* CDS EFIS CP modes 2 discrete word
* Ground proximity discrete word 2
* Captain EFIS CP discrete word 2.
CDS - EXTERNAL INTERFACE INTRODUCTION
EFFECTIVITY
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The CDS EFIS CP modes 1 discrete word has this data:
* TFC selected
* Center display format
* Baro minimums aural enabled
* VOR left selected
* VOR right selected
* ADF left selected
* ADF right selected
* Heading up map format
* Airports selected
* Route data selected
* Waypoints selected
* Navaid data selected
* Position data selected
* PFD/ND display format
* Plan mode selected
* Approach mode selected
* VOR mode selected
* Map mode selected.
The CDS EFIS CP modes 2 discrete word has this data:
* Baro minimums selected
* RA health
* GPWC V1 callout enable
* FPV selected
* Meters selected
* STD selected
* HPA selected
* HG selected
* Terrain selected
* WXR selected.
The GPWC discrete word 2 has this data:
* Terrain unavailable (position)
* Terrain status fail
* Terrain caution
* Terrain warning
* Windshear caution
* Windshear warning
* Ground proximity warning.
The EFIS CP discrete word 2 has this data:
* Systems page
* DSM F/O LOWER ND
* DSM F/O LOWER NORM
* DSM F/O lower ENG
* DSM F/O INBD PFD
* DSM F/O INBD ENG
* DSM F/O INBD MFD
* DSM F/O NORM
* DSM F/O OUTBD PFD.
Data Loader Bus
The DEUs send CDS BITE fault history data on the data loader
bus.
DEU-FMC Bus
The DEUs send this data to the flight management computer
system (FMCS) on the DEU-FMC bus:
* CDS EFIS CP modes 1 discrete word
CDS - EXTERNAL INTERFACE INTRODUCTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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* CDS EFIS CP modes 2 discrete word
* TCAS RA status
* TCAS system status
* BITE response data.
The CDS EFIS CP modes 1 discrete word has this data:
* TFC selected
* Center display format
* Baro minimums aural enable
* VOR left selected
* VOR right selected
* ADF left selected
* ADF right selected
* Heading up map format
* Airports selected
* Route data selected
* Waypoints selected
* Navaid data selected
* Position data selected
* PFD/ND display format
* Plan mode selected
* Approach mode selected
* VOR mode selected
* Map mode selected.
The CDS EFIS CP modes 2 discrete word has this data:
* Baro minimums selected
* RA health
* GPWC V1 callout enable
* FPV selected
* Meters selected
* STD selected
* HPA selected
* HG selected
* Terrain selected
* WXR selected.
The FMCS uses this data:
* CDS EFIS CP 1 discrete word data
* CDS EFIS CP 2 discrete word data
* BITE response data.
The BITE response data is for these LRUs:
* DEUs
* EECs
* APU.
EEC/APU Bus
The DEUs send data to the main engine electronic engine
control (EEC) and APU electronic control unit (ECU) on the EEC/
APU bus. Only DEU 1 sends data to the APU ECU.
The EEC/APU bus has this data:
* Flight number
* Baro corrected altitude
* Mach number
* Total air temperature
* Total pressure
* Static pressure
CDS - EXTERNAL INTERFACE INTRODUCTION
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
31-62-00-105
* Time/date
* Target N1
* ADR discrete word
* CDS DEU discrete word 1
* CDS DEU discrete word 2
* CDS DEU discrete word 3
* BITE test word.
The ADR discrete word has this data:
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