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31 - INDICATING/RECORDING SYSTEMS
31-33-00 DFDRS: FDIU INTERFACES
CONTENTS:
ARINC 429 Inputs
ARINC 429 Outputs
Discrete Inputs
Discrete Output
HARVARD BIPHASE Output
HARVARD BIPHASE Input
BIPOLAR RZ Output
TMUDFDA02 LEVEL 3
EFFECTIVITY 31-33-00 Page 1
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MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
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DFDRS: FDIU INTERFACES
ARINC 429 INPUTS
Most information is given to the Flight Data Interface
Unit (FDIU) through ARINC 429 buses.
The FDIU receives 12 ARINC 429 buses and it has
provision for 4 additional input buses.
NOTE: The Linear Accelerometer sends an analog signal
to the SDACs which digitalizes it before sending
it to the FDIU.
ARINC 429 OUTPUTS
2 ARINC 429 output buses are provided.
The output bus to the CFDIU is used for BITE information
and test operation.
The ouptut bus to the Data Management Unit (DMU)
enables the Aircraft Integrated Data System (AIDS) to
record the mandatory parameters.
DISCRETE INPUTS
55 discrete inputs are provided for aircraft
identification coding.
4 other inputs are provided for SSFDR status, event
mark, QAR FAIL and QAR MEDIA LOW information.
DISCRETE OUTPUT
1 discrete output is used by the SDACs for displaying
the FDIU FAULT message on the ECAM.
NOTE: For displaying the DFDR FAULT message on the
ECAM, a SSFDR status signal is directly sent by
the SSFDR to the SDACs.
HARVARD BIPHASE OUTPUT
The FDIU sends the data to be recorded to the SSFDR
in HARVARD BIPHASE format on an output bus.
HARVARD BIPHASE INPUT
For verification purposes, the FDIU receives the SSFDR
playback data in HARVARD BIPHASE format on an input
bus.
BIPOLAR RZ OUTPUT
The FDIU sends the data to be recorded to the optional
QAR in BIPOLAR RZ format on an output bus.
TMUDFDA02-T01 LEVEL 3
EFFECTIVITY 31-33-00 Page 2
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UF94200
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DFDRS: FDIU INTERFACES
TMUDFDA02-P01 LEVEL 3
EFFECTIVITY 31-33-00 Page 3
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TMUDFDA02 LEVEL 3
EFFECTIVITY 31-33-00 Page 4
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UF94200
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31 - INDICATING/RECORDING SYSTEMS
31-33-00 DIGITAL FLIGHT DATA RECORDING
SYSTEM COMPONENTS
CONTENTS:
FDIU
SSFDR
Linear Accelerometer
QAR/OQAR
TMUDFDD02 LEVEL 3
EFFECTIVITY 31-33-00 Page 1
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DIGITAL FLIGHT DATA RECORDING SYSTEM COMPONENTS
FDIU
IDENTIFICATION
FIN: 2TU
LOCATION
ZONE: 127, 87VU
COMPONENT DESCRIPTION
The Flight Data Interface Unit (FDIU) is a unit with
modules for collecting mandatory parameters and
converting them to a recordable form.
TMUDFDD02-T01 LEVEL 3
EFFECTIVITY 31-33-00 Page 2
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DIGITAL FLIGHT DATA RECORDING SYSTEM COMPONENTS - FDIU
TMUDFDD02-P01 LEVEL 3
EFFECTIVITY 31-33-00 Page 3
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DIGITAL FLIGHT DATA RECORDING SYSTEM COMPONENTS
SSFDR
IDENTIFICATION
FIN: 1TU
LOCATION
ZONE: 312
COMPONENT DESCRIPTION
The Solid State Flight Data Recorder (SSFDR) is a solid
state memory recorder controlled by a microcomputer.
The SSFDR has an Underwater Locator Beacon (ULB)
attached to the front panel. Maintenance has to be
performed at determined time intervals to replace the
battery of the ULB.
The SSFDR is located in the unpressurized area of the
rear fuselage.
TMUDFDD02-T02 LEVEL 3
EFFECTIVITY 31-33-00 Page 4
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
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