*
Systems buses.
Only one of the four CPMs in a cabinet sends time and date data to other airplane systems. The priority for the CPM that sends the data is:
*
CPM/Comm
*
CPM/GG (M010)
*
CPM/GG (M011)
*
CPM/ACMF or CPM/Basic.
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AIMS -UNIVERSAL TIME (COORDINATED) FUNCTION FUNCTIONAL DESCRIPTION
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AIMS -SYSTEM GROUND TESTS
General
These are the two different types of systems tests:
*
IOM module reset test
*
CPM reset test.
IOM Module Reset Test
Each of the four IOMs have an individual module reset test.
This test makes sure that the IOM operates correctly. The approximate time to run the test is less than one minute. After the test starts, you can not stop it.
This test may show failures of fault tolerant components which may not have an effect on airworthiness. Use EICAS messages with the proper documentation to find airworthiness.
CPM Module Reset Test
Each of the four CPMs have an individual module reset test.
This test makes sure that the CPM operates correctly. The approximate time to run the test is less than one minute. After the test starts, you can not stop it.
This test may show failures of fault tolerant components which may not have an effect on airworthiness. Use EICAS messages with the proper documentation to find airworthiness.
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AIMS -SYSTEM GROUND TESTS
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AIMS -OPERATIONAL TESTS
General
You can do AIMS operational tests from the MAT. Use the operational test to do a check of the ARINC 429 relays in each IOM.
Operational Tests
Each of the four IOMs has an operational test.
This test makes sure that the ARINC 429 relays in the IOM operate correctly. The approximate time to run the test is less than one minute. After this test starts, you can not stop it.
This test may show failures of fault tolerant components which may not have an effect on airworthiness. Use EICAS messages and proper documentation to find airworthiness.
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AIMS -OPERATIONAL TESTS
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AIMS -LRU REPLACEMENT TESTS
General
These are the two LRU replacement tests:
*
IOM module reset test
*
CPM reset test.
IOM Module Reset Test
Each of the four IOMs has an individual module reset test.
This test makes sure that the IOM operates correctly. The approximate time to run the test is less than one minute. After the test starts, you can not stop it.
This test may show failures of fault tolerant components which may not have an effect on airworthiness. Use EICAS messages and proper documentation to find airworthiness.
CPM Module Reset Test
Each of the four CPMs has an individual module reset test.
This test makes sure that the CPM operates correctly. The approximate time to run the test is less than one minute. After the test starts, you can not stop it.
This test may show failures of fault tolerant components which may not have an effect on airworthiness. Use EICAS messages and proper documentation to find airworthiness.
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AIMS -LRU REPLACEMENT TESTS
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WARNING ELECTRONIC SYSTEM -INTRODUCTION
General
The warning electronic system (WES) supplies indications of incorrect airplane system conditions to the flight crew.
Abbreviations and Acronyms
*
ADIRU -air data inertial reference unit
*
AFDC -autopilot flight director computer
*
AGC -automatic gain control
*
AIMS -airplane information management system
*
AL -body longitudinal acceleration
*
AN -body normal acceleration
*
AOA -angle of attack
*
AOA AS -autoslat trip point
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