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is configured as a maintenance page control panel. The first page displayed will be the
MAINTENANCE MENU page.
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Maintenance Data Computer
Flight Crew Operating Manual MASTER
CSP A--013
Maintenance Diagnostic Computer System <MST>
Figure 02---40---1
MAINT (Guarded)
Used to select the
appropriate MFD
for maintenance
diagnostics.
Maintenance Switch
Behind Pilot’s Seat
CURSOR
MFD MODE
INSTRUCTION
LINE
Display Control Panel
Pilot’s and Copilot’s Side Panels
BRG POINTER 1
<0040>
BRG POINTER 2
RDR TFC
NAV SOURCE
X--SIDE
Maintenance Main Menu Page
Multifunction Display
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AURAL/VISUAL INDICATING AND
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Maintenance Data Computer
Flight Crew Operating Manual
CSP A--013
MASTER
A. Maintenance Menu Page Overview
S LRU STATUS -- Displays a list of current (MDC detected) non--functioning LRU’s and
their status.
S LRU FAULT HISTORY -- Displays a list of all stored LRU faults, in the MDC memory,
for the last 50 flight legs.
S LRU DIAGNOSTIC DATA-- Displays a list of all LRU’s and the current bit patterns of
the diagnostic words of each LRU.
S ENGINE EXCEEDANCE HISTORY-- Displays a list of all engine exceedances for
the past 50 flight legs.
S ENGINE TREND HISTORY -- During each flight leg the MDC stores in its memory a
list of selected engine parameters (called a snapshot) The MDC can store up to 50
snapshots.
S LIFE CYCLE DATA-- Displays the number of thrust reverser cycles and the engine
operating hours.
S DISK OPERATIONS -- In conjunction with the data loader, is used to upload or
download MDC files.
S CLOCK SET OPERATION -- Used to set the MDC internal clock. Normally, the
MDC uses the aircraft clocks for time reference. If the aircraft clocks fail, the MDC
internal clock is used.
S AIRCRAFT IDENT SET OPERATION-- Used to set aircraft identification for the
LRU’s.
S FCC DIAGNOSTICS -- Displays instructions to put flight control system into
diagnostic mode.
S CENTRAL STRAPPING UNIT CONFIG--Used to check the configuration of the
integrated avionics processor system (IAPS) computers.
When in the MDC mode, the Display Control Panel buttons function as follows:
S BRG1 (upper) -- used to move the cursor UP, or to scroll backward.
S BRG2 (lower) -- used to move the cursor DOWN, or to scroll forward.
S RDR -- used to select a line, or to switch the display format from binary to
hexadecimal.
S TFC -- used to return to the menu page.
S NAV SOURCE -- used to display computer word labels.
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Maintenance Data Computer
Flight Crew Operating Manual MASTER
CSP A--013
B. Data Loader Unit
The data loader is a portable unit that plugs into a connector on the copilots bulkhead
below circuit breaker panel No. 2. Through the download function from the MENU
page, the unit enables the transfer of data files, between DOS-compatible diskettes and
applicable aircraft systems. The data loader unit provides the capability to format disks,
read directories and read/write files.
The data loader is mounted between the galley and the aft side of the copilots
bulkhead. Through the download function from the MENU page, the unit enables the
transfer of data files, between DOS-compatible diskettes and applicable aircraft
systems. The data loader unit provides the capability to format disks, read directories
and read/write files. <0018>
Data Loader Unit <0018>
Figure 02---40---2
Diskette Eject
Used to eject
diskette from
disk drive.
FAIL Indicator (red)
POWER Indicator (green) Indicates disk drive failure.
Indicates that power to disk
drive is available.
Drive In--Use Indicator
Indicates that data are
being read from or
written to diskette.
Disk Drive
Used to upload / download
MDC / FMS data
Data Loader Unit
NOTE
Indicators are not dimmable.
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RECORDING
Maintenance Data Computer
Flight Crew Operating Manual
CSP A--013
MASTER
C. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
IAPS LEFT
Maintenance
MDC
Data
Computer
MDC IAPS LEFT
FMS/ MDC
<0024><0050>
　
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