-A solid ILLUMINATION of the PASS LED with the FAIL LED blinking at a 0.5 Hz rate when a noncritical fault occurred, but the CMU remains operational
-A solid ILLUMINATION of the FAIL LED when a critical fault occurred where the CMU is unable to enter an operational state.
For more specific fault information, access the Maintenance Menu and Fault Log through the MCDU.
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PDL CONNECTOR
SELF TEST INDICATORS
SELF TEST BUTTON
SOFTWARE LOADING PCMCIA CARD SLOT
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ACARS -COMMUNICATIONS MANAGEMENT UNIT
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ACARS - AIRCRAFT PERSONALITY MODULE Purpose
The CMU utilizes an aircraft personality module (APM) external to the CMU to hold non-volatile aircraft configuration data
General
The APM is a self-contained memory device, which is read upon startup of the CMU. As a minimum, aircraft registration, aircraft type, and equipment configuration information is held in the APM.
The APM replaces the need for LRU option pins. When the CMU is replaced the APM remains installed in the aircraft. Once a new CMU is installed, the new CMU will use the data stored in the APM to initialize itself to the correct interface configuration.
If the APM is replaced, it has to be programed with aircraft specific information. This is accomplished utilizing the MCDU and ACARS Maintenance BITE pages.
NOTE: If no data is programmed in the APM the CMU PROGRAM
APM page will be displayed when the <ACARS prompt is
selected on the MCDU.
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ACARS - AIRCRAFT PERSONALITY MODULE
December 1, 2004
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
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SWACOM TRAINING GUIDE
ACARS - AIRCRAFT PERSONALITY MODULE Purpose
The CMU utilizes an aircraft personality module (APM) external to the CMU to hold non-volatile aircraft configuration data
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