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Analog signals are sent by the Linear Variable
Differential Transducers to monitor the control spool
valves of the PCU.
AIR DATA / INERTIAL REFERENCE UNITS (ADIRUs)
Air Data / Inertial Reference Units 1 and 2 send
corrected angle of attack and computed air speed data
for ALPHA LOCK computation.
LANDING GEAR CONTROL AND INTERFACE UNITS (LGCIUs)
Landing Gear Control and Interface Units send flap
disconnect data for control of flap attachment failure
detection.
CENTRALIZED FAULT AND DISPLAY INTERFACE UNIT (CFDIU)
The CFDIU sends data about failure environment and
command words for BITE tests.
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SLAT FLAP CONTROL COMPUTER CONTROL INTERFACES
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27 - FLIGHT CONTROLS
27-00-00 SFCC MONITOR INTERFACES
CONTENTS:
Flight Warning Computers
System Data Acquisition Concentrators
Elevator and Aileron Computers - Spoiler Elevator
Computers
Flight Augmentation Computers
Ground Proximity Warning Computer
Centralized Fault Display Interface Unit
Air Data/Inertial Reference Units
Cabin Intercommunication Data System
Engine Interface Units
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SFCC MONITOR INTERFACES
FLIGHT WARNING COMPUTERS (FWCs)
The Instrumentation Position Pick off Units supply
slat/flap position data to the Flight Warning Computer,
for warning activation.
SYSTEM DATA ACQUISITION CONCENTRATORS (SDACs)
The System Data Acquisition Concentrators receive
ARINC data in order to generate the appropriate ECAM
displays. Information received from the SFCCs can be
displayed after the flight on operator request. Level
2 cautions, resulting from flap system faults, are
processed in the System Data Acquisition Concentrators
(SDACs) and then displayed on the ECAM upper display.
Slat channel interface is identical.
ELEVATOR and AILERON COMPUTERS (ELACs), SPOILER
ELEVATOR COMPUTERS (SECs)
Position data received from the Slat Flap Control
Computers are used for electrical flight control law
selection.
FLIGHT AUGMENTATION COMPUTERS (FACs)
Position data sent to the Flight Augmentation Computers
are used for flight envelope protection computation.
GROUND PROXIMITY WARNING COMPUTER (GPWC)
The Ground Proximity Warning Computer receives the
flap position data for approach and landing via the
control panel 21VU.
There is no slat information sent by the SFCC slat
channel
CENTRALIZED FAULT DISPLAY INTERFACE UNIT (CFDIU)
The Centralized Fault Display Interface Unit receives
failure data from the Slat Flap Control Computers and
command words for the BITE test.
Information received from the SFCCs can be displayed
after the flight on operator request.
Test plugs can be used for trouble-shooting when the
Centralized Fault Display System is inoperative or not
installed.
Slat channel interface is identical.
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SFCC MONITOR INTERFACES
AIR DATA/INERTIAL REFERENCE UNITS (ADIRUs)
Flap position data are used by the Air Data / Inertial
Reference Unit for Angle Of Attack and static source
correction.
Flaps higher than 9o and 34o data are used for Angle
Of Attack correction.
Flaps higher than 19o is used for the static source
correction. There is no slat channel interface to the
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