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TMUFACJ01 LEVEL 3
EFFECTIVITY 22-66-00 Page 8
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 22 AUTO FLIGHT SYSTEM
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22 - AUTO FLIGHT SYSTEM
22-83-00 FMGC INTERFACES
CONTENTS:
General
Discrete Inputs
Discrete Outputs
ARINC Inputs
ARINC Outputs
TMUFGCG03 LEVEL 3
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FMGC INTERFACES
GENERAL
The Flight Management and Guidance Computer (FMGC)
interfaces consist of discretes and ARINC 429 digital
buses. There are no analog interfaces.
DISCRETE INPUTS
The schematic shows all types of information received
by the FMGC under discrete form. All types of
information are represented but the schematic is
simplified; each arrow corresponds to several wires,
the number of which is indicated on the schematic.
NOTE: - The validity discretes (e.g.: FWC VALID) are
generally used to consolidate the ARINC 429
information in the internal logics of the FMGC.
- INST DISC AP comes from the takeover pushbutton
on sidesticks.
- SIDE 1 = 1 for FMGC 1,
SIDE 1 = 0 for FMGC 2.
- AP DISC (ELAC): AP disconnection order coming
from ELAC 1 and 2.
TMUFGCG03-T01 LEVEL 3
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FMGC INTERFACES - DISCRETE INPUTS
TMUFGCG03-P01 LEVEL 3
EFFECTIVITY 22-83-00 Page 3
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MECHANICS / ELECTRICS & AVIONICS COURSE 22 AUTO FLIGHT SYSTEM
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FMGC INTERFACES
DISCRETE OUTPUTS
The schematic shows the information sent by the FMGC
under discrete form.
Generally, an arrow corresponds to several wires.
For example, STICK LOCK corresponds to 2 wires:
- one, 28V/open (28V meaning locked), sent by the FMGC
command side,
- the other, ground/open (ground meaning locked), sent
by the FMGC monitor side.
NOTE: - STICK LOCK: For sidestick locking.
- ILS INHIB: To inhibit ILS test.
- RUDDER LOCK: For rudder pedal locking.
- The watch dog is part of the internal
monitoring.
TMUFGCG03-T02 LEVEL 3
EFFECTIVITY 22-83-00 Page 4
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MECHANICS / ELECTRICS & AVIONICS COURSE 22 AUTO FLIGHT SYSTEM
UF94200
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FMGC INTERFACES - DISCRETE OUTPUTS
TMUFGCG03-P02 LEVEL 3
EFFECTIVITY 22-83-00 Page 5
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FMGC INTERFACES
ARINC INPUTS
The schematic shows the FMGC input ARINC 429 buses.
NOTE: - OWN: Of the considered side.
- OPP: Of the opposite side.
- Air Data Reference (ADR) and Inertial
Reference (IR) buses come from the ADIRS.
- FG MON is a bus coming from the FMGC monitor
side and going to the command side of the same
FMGC.
TMUFGCG03-T03 LEVEL 3
EFFECTIVITY 22-83-00 Page 6
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MECHANICS / ELECTRICS & AVIONICS COURSE 22 AUTO FLIGHT SYSTEM
UF94200
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FMGC INTERFACES - ARINC INPUTS
TMUFGCG03-P03 LEVEL 3
EFFECTIVITY 22-83-00 Page 7
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FMGC INTERFACES
ARINC OUTPUTS
The schematic shows the FMGC output ARINC 429 buses.
NOTE: There are 2 FMGC C buses because there are 2
output buffers.
One of them goes through the RMP, but it is cut
when the RMP itself controls the radio navigation
receivers.
TMUFGCG03-T04 LEVEL 3
EFFECTIVITY 22-83-00 Page 8
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 22 AUTO FLIGHT SYSTEM
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FMGC INTERFACES - ARINC OUTPUTS
TMUFGCG03-P04 LEVEL 3
EFFECTIVITY 22-83-00 Page 9
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 22 AUTO FLIGHT SYSTEM
　
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