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The MCDUs automatically go to the FMCS DATALOAD page when the MCDU receives valid data from the loader.
The data load process is automatic. Except to change diskettes, no further operation is necessary after you do the above steps.
The data load process is automatic. When the FMCS source select switch is in the NORMAL position, the data loads into FMC 1. You then do a crossload and load the data into FMC 2 via the FMCS inter system bus.
Return the data loader control panel to the NORM position after the transfer is complete.
NOTE:  Do not interrupt electrical power to the system during software loading. If power is interrupted, you will need to do the software load procedure again.
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL

A34-61-00-049.fm
DATA LOAD SELECTOR C
SINGLE SYS L
R CAPT
F/O UPR
LWR
SYSTEM SELECT NORMAL
FMCCDU
DATA TRANSFER
UNIT RECEPTACLE

DATA LOADER
DATA LOADER CONTROL PANEL

PORTABLE DATA LOADER  P18-2 CIRCUIT BREAKER PANEL
INTER SYSTEM BUS
FMC 1

NOTE: ON AIRCRAFT WITH A SINGLE SELECTOR KNOB ON THE DATA LOADER CONTROL PANEL THE FMC SELECTOR SWITCH ON THE P-5 OVERHEAD IS USED TO SELECT THE FMC
FMC 2  TO BE LOADED WITH SOFTWARE.
FMCS - FMC DATA LOADING
January 2005
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- 136 -
SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved

A34-61-00-092.fm
SOUTHWEST AIRLINES.

FMCS - MCDU DATA LOADING
General
You use the portable data loader (PDL) to load the operational program software (OPS) into the MCDUs.
NOTE:  The portable data loader is not a Boeing supplied item. This
coverage is included for information only. See the data loader
instructions, which are supplied by the vendor.

To load the OPS into the MCDUs, set the data loader selector to the CDU position and the data loader 3-position switch to the L or R position depending on which MCDU is to be loaded. This connects the loader to the MCDU being loaded.
Preparation
This is a summary of the steps to load data with a PDL:
-Airplane must be on the ground
-Apply electrical power to the airplane
-Open the DATA LOADER circuit breaker on the P18-2 panel
-Connect the PDL to the data transfer receptacle
-Close the DATA LOADER circuit breaker
-Turn the PDL on
-Set the data loader selector to the CDU position
-Set the data loader 3-position switch to the MCDU you will load
(the L position loads MCDU 1 and the R position loads MCDU 2)
-Open the data loader access door
-Put the MCDU OPS software diskette into the PDL.

The MCDUs show the DATA LOADER page when the MCDU receives valid data from the loader.
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737-700 MAINTENANCE TRAINING MANUAL

The data load process is automatic. When the MCDU shows the message LOAD COMPLETE, remove the diskette from the PDL and perform the applicable software verification procedure.
Return the data loader selector to the NORM position after the transfer is complete and disconnect the PDL from the data transfer unit recepticle.
NOTE:  Do not interrupt electrical power to the system during software loading. If power is interrupted, you will need to do the software load procedure again.
34-61

SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL

DATA LOAD SELECTOR 
C 
L CAPT UPR  SINGLE SYS  R F/OLWR 
SYSTEM SELECT 
DATA TRANSFER  NORMAL CDU FMC 
UNIT RECEPTACLE 
DATA LOADER  DATA LOADER CONTROL PANEL 
PORTABLE DATA LOADER (TYPICAL)  P18-2 CIRCUIT BREAKER PANEL 
　
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