An LRU's programming pin inputs come in on the pin contacts. The switches set the programming pins.
The security cover goes over the switch seal plug. The security cover and the switch seal plug keeps the switches stationary.
The program switch module gives this information to an LRU:
-Equipment physical orientation
-Airplane type
-Number of units installed
-Customer specific options.
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737-600/700/800/900 TRAINING MANUAL
SWITCH
(24)
123456789101112
123456789101112
O
O
SECURITY
N
N
COVER
CTS 206-12 T047 S1
CTS 206-12 T047 S2
1357 9 11131517
46 8 10121416
218
WIRES TO LRU (TYPICAL)
PIN CONTACTS (INSIDE CAVITY)
(26) SWITCH SEAL PLUG (2)
19 21 23 25
20 22 24 26
PIN CONTACTS
(INSIDE CAVITY)
(26)
00-00-00-036 Rev 1 03/20/1997
737 GENERAL - PROGRAM SWITCH MODULE
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ALTEON PROPRIETARY - Copyright (c) - See title page for details
737 GENERAL -- LOADABLE SOFTWARE General
Some of the LRUs in the 737 need both hardware and software. Without the software, the logic circuits in the LRUs can not do their specified function. They must have the proper software load.
You can load the software in the LRU at the shop or you can load it at the airplane.
Systems
These LRUs have loadable software features:
-Flight management computer (FMC)
-Control display unit (CDU)
-ARINC communications addressing and reporting
system (ACARS)/communication management unit (CMU) -Display electronic unit (DEU) -Satellite communication (SATCOM) -Flight control computer (FCC) -APU engine control unit (ECU) -Passenger flight information distribution system
(PFIDS) or AIRSHOW
-Digital flight data acquisition unit (DFDAU)
-Airplane condition monitoring system (ACMS).
NOTE: Some of the above units are for optional systems on the airplane. When the airplane does not have the LRU for the optional system, the switch position for the optional system shows INOP.
737-600/700/800/900 TRAINING MANUAL
Except for the electronic engine control (EEC), you use the data loader at the P61 to load the software.
You load the EEC software at the engine with a portable data loader.
Loadable Software Binder
A binder is in the book compartment at the bottom of the P61. The binder has all the software necessary to load software at the airplane.
Installation Procedure
These are the basic steps to load software at the airplane:
-Supply electrical power -Set the data load select switch to the applicable
LRU position
- Put the diskette into the disk drive
- Remove the diskette when the software load is
complete
- Set the data load select switch to NORM
-Use the FMCS to do a check of the software part number.
A software installation procedure is in the maintenance manual, maintenance practices section (-200 page block) for each software loadable LRU.
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P61 PANEL
00-00-00-031 Rev 1 06/01/1999
AIRBORNE DATA LOADER (TYPICAL)
DATA LOAD SELECTOR
C
SINGLE SYS
R CAPT
L
F/O UPR
LWR
FLIGHT COMPARTMENT
(LOOKING AFT)
SYSTEM SELECT
NORMAL ACMS
FMC DFDAU
CDU PFIDS
ACARS/CMU
LOADABLE
INOP INOP
SOFTWARE BINDER
INOP INOP
DEUAPU
INOP
INOP INOP
SATCOM INOP
FCC
1
INOP
DATA LOADER CONTROL PANEL
OPTIONAL SYSTEMS NOT ACTIVE
ARE LABELED INOP.
737 GENERAL - LOADABLE SOFTWARE
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737 GENERAL -- ANTENNA LOCATIONS Antenna Location
These are the communication and navigation system antennas:
-Weather Radar -Traffic alert and collision avoidance system
(TCAS)
-Air traffic control (ATC)
-Global positioning system (GPS)
-Very high frequency (VHF) communication
-Automatic direction finder (ADF)
-High frequency (HF) communication
-VHF omni-range (VOR)
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