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- a Multipurpose Disk Drive Unit to upload or
download data,
- a stowage box with a 42 disk maximum capacity,
- a Data Loading Routing Box (DLRB) to route
the input/output data between the disk unit
and the target computer.
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UP AND DOWN DATA LOADING SYSTEM: UP AND DOWN DATA LOADING SYSTEM PRESENTATION -
GENERAL
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UP AND DOWN DATA LOADING SYSTEM: UP AND DOWN DATA LOADING SYSTEM PRESENTATION
UP LOADING
The aircraft system computers use the loading system
to update their data base (for example the FMGC) or
to modify parts of their operational software (for
example the ATSU).
Up loading is automatically performed from a 3.5 inch
disk, via an internal logic specific to each computer.
DOWN LOADING
The down loading system is used to down load, to a 3.5
inch disk, the data recorded by certain computers
during aircraft operation (for example the DMU).
Down loading is done automatically through an internal
logic specific to each computer.
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31 - INDICATING/RECORDING SYSTEMS
31-38-00 UP AND DOWN DATA LOADING SYSTEM:
UP AND DOWN DATA LOADING SYSTEM
UTILIZATION
CONTENTS:
General
Up Loading procedure
Down Loading procedure
Abnormal Operation
Self Examination
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UP AND DOWN DATA LOADING SYSTEM: UP AND DOWN DATA LOADING SYSTEM UTILIZATION
GENERAL
The MDDU (if installed) has two functions: uploading
and downloading.
According to the operation to be performed, the disk
which is used has to contain specific information (e.g.
configuration file).
Before performing an up data loading operation, refer
to the relevant procedure for the corresponding system
in the Aircraft Maintenance Manual.
UP LOADING PROCEDURE
When you have selected the disk corresponding to the
computer to be loaded from the disks in the storage
box, you have to select the computer by means of the
Data Loading Selector (DLS).
The "MDDU READY" message is displayed on the MDDU
window: the system is in the standby state.
You have to open the MDDU door, insert the disk in the
data loader disk drive and close the MDDU door.
When the disk is inserted in the disk drive, the "READY"
message is displayed: this message aknowledges disk
insertion.
The MDDU processes the specific information contained
in the disk, contacts the computer to be loaded and
displays the "WAIT RESPONSE" message until the computer
is ready to receive the data.
This message stays permanently displayed when:
- the Data Loading Selector is set to the wrong
computer,
- the configuration file is not correct,
- the Landing Gear Computer Interface Unit 1 is
not powered.
As soon as a dialog is established between the computer
to be loaded and the data loader, the "TRANSF IN PROG"
message is displayed and the data is transferred to
the computer.
NOTE: The disk should not be extracted while "TRANSF
IN PROG" message is displayed as damage to the
disk could result.
When the data transfer is terminated and no anomalies
　
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