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conventional control panel.
STL 945.7136/97 13.4
A319/A320/A321 RMP architecture
MCDU 1 MCDU 2
FMGC 1 FMGC 2
NAV NAV
COMM.
VOR 1
RMP 2
VHF 1 VHF 2 VOR 2
DME 1 HF 1 HF 2 DME 2
ILS 1 ILS 2
ADF 1 ADF 2
RMP 1
STL 945.7136/97 13.5
A319/A320/A321 radio management concept architecture
Communication tuning
Any radio communication system can be tuned from any of
two RMPs. In case of failure any RMP can take over from the
other one.
Navigation tuning
Three different operating modes exist.
􀁺 Automatic : VOR/DME, ILS and ADF are automatically
tuning controlled by the FMGS.
􀁺 Manual tuning : for selection if a specific frequency
through the FMGS CDU without affecting
the automatic function of the FMGS.
􀁺 Back-up tuning : when both FMGCs are inoperative or
when an emergency electrical source is in
operation, any NAV receiver may be tuned
by the crew from any RMP ; each RMP
controls on side receivers.
When one of both FMGCs is inoperative, the remaining one
controls all receivers.
STL 945.7136/97 13.6
A319/A320/A321 COMM – audio control panel
Transmission keys
and SELCAL lights
Voice/ident
filter key
SELCAL and CALL
reset key
Interphone/Off
/Radio switch
Radio nav audio listening
and volume control
Transmission keys
and CALL lights
Audio listening
and volume control
Public address
audio listening and
volume control
PA key for boomset
oxygen mask or
hand microphone
operation
STL 945.7136/97 13.7
A319/A320/A321 COMM – audio control panel
The audio integrating system provides the management of
all audio signals produced by and feeding the radiocommunications,
radio navigation and interphone systems :
􀁺 Basic installation includes :
- three Audio Control Panel (ACP) – two on pedestal,
one on overhead panel
- one Audio Management Unit (AMU) in avionics bay
- one SELCAL code selector in avionics bay.
􀁺 Provision exists for supplementary ACP’s
􀁺 All selections and volume adjustments carried out by
crew through ACPs
􀁺 All ACPs are fitted for maximum capacity (three VHF,
two HF, public address, calls, two VOR, two ADF, ILS
and provision for MLS).
􀁺 Each ACP and associated AMU electronic card are fully
independent and microprocessor controlled.

STL 945.7136/97 14.1
14. Maintenance centralized
fault display system

STL 945.7136/97 14.3
A319/A320/A321 Centralized Fault Display System (CFDS)
General
Line maintenance of the electronic systems is based on the
used of a Centralized Fault Display System (CFDS).
The purpose of the CFDS is to give maintenance
technicians a central maintenance aid to intervene at
system or subsystem level from multipurpose CDUs located
in the cockpit :
- to read the maintenance information
- to initiate various tests.
Two levels of maintenance should be possible using the
CFDS :
- maintenance at an out-station (LRU change)
- maintenance in the hangar or at the main base
(troubleshooting).
STL 945.7136/97 14.4
A319/A320/A321 CFDS - architecture
Aircraft
system
BITE
CFDIU
General parameters :
- date / time
- flight No.
- aircraft identification
- flight phases
AIDS FMGS
1 and 2
MCDU 2
Printer
MCDU 1
ACARS
VHF 3
Aircraft systems
STL 945.7136/97 14.5
A319/A320/A321 CFDS - architecture
Advantages of the CFDS
A revised maintenance concept provides a :
- reduction of the duration of operations
- reduction of the maintenance crew training time
- simplification of technical documentation
- standardization of the equipment
- simplification of the computers which no longer
display any BITE ;
Integration of the CFDS
Integrated in the Maintenance and Recording Data
System (MRDS) comprising :
􀁺 Basic equipment
- A Centralized Fault Display Interface Unit (CFDIU)
- A digital Flight Data Recorder (DFDR) and its
interface unit
- Two multipurpose CDUs (MCDUS) located on the
pedestal.
Note : The MCDUS can be used for : FMS, MRDS
options (ACARS, AIDS).
􀁺 Optional equipment
- A multi-use printer
- A quick access recorder (QAR)
- An AIDS
STL 945.7136/97 14.6
A319/A320/A321 CFDS – example of use - 1
STL 945.7136/97 14.7
A319/A320/A321 CFDS – example of use - 2
　
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