(d)
TEST PRECONDITIONS page
1) Selection of some tests causes a TEST PRECONDITIONS page to be shown. This page lists all the initial conditions which must be met before the test will operate safely and satisfactorily. There can be more than one page of initial conditions.
(e)
Test operation and results
1) During a regular BITE test, the IN PROGRESS indication is shown. During an interactive BITE test, operator instructions will be shown on the CDU.
2) When the test is completed, the IN PROGRESS indication disappears. The test result (DONE, PASS, or FAIL) is shown adjacent to the name of the completed test. a) A DONE indication is shown if the operator is required
to monitor the test. Failure information for most tests is available using the existing faults function. For some tests, the operator determines the test result by watching the tested system operate.
b) A PASS or FAIL indication is shown if the CMC monitored the test. If a PASS indication is shown, no failures occurred during the test. If a FAIL> prompt is shown, failure information is available on the GROUND TEST MSG page.
(f) GROUND TEST MSG page
1) The GROUND TESTS MSG page shows data related to the failure of the ground test.
(11) Existing Faults (Fig. 14)
(a) EXISTING FAULTS page
1) When <EXISTING FAULTS is selected, the EXISTING FAULTS page shows the systems, in ATA chapter sequence, that have active CMCS fault messages. CMCS messages for faults in any ATA chapter are then accumulated until you return to the CMC MENU. New ATA chapter prompts can appear, but a prompt stays in the list even if all faults in that system become inactive.
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2) A list of more than four systems continues on subsequent pages.
3) If there are no active CMCS fault messages in any system, the indication NO ACTIVE FAULTS is shown.
(b) EXISTING FAULTS MSG page
1) Each EXISTING FAULTS MSG page shows a CMCS fault message. There may or may not be a FDE correlated to the CMCS fault message.
2) An asterisk adjacent to the CMCS fault message shows that the fault that caused the CMCS message is active.
3) If a FDE is shown, an asterisk (*) above the FDE indicates that the FDE is shown on the EICAS display. A caret (<) adjacent to the FDE shows that there are more FDEs correlated to the CMCS fault message.
4) The total number of pages in the page indication shows the number of CMCS fault messages in the selected system that can be shown. The messages are not always shown in the sequence of occurrence.
5) When a fault becomes active while the existing faults function is in use, an EXISTING FAULTS MSG page is added for the fault. When a fault becomes inactive while the existing faults function is in use, the message page is retained without the asterisk (which indicates an active fault) on the CMCS fault message.
6) The <READ SNAPSHOT prompt shows when there is a maintenance page snapshot that is related to the flight deck effect.
(12) Fault History (Fig. 15)
(a)
The fault history function provides information about CMCS fault messages that are stored in the non-volatile memory (NVM) of the CMC. This information includes the date and time (GMT) that the CMCS fault message was stored.
(b)
The CMC can store a maximum of 500 CMCS fault messages in its NVM. A CMCS fault message is stored for a maximum of 99 flight legs or until 500 CMCS fault message are in the NVM. When the NVM is full, the first CMCS fault message to be stored is automatically erased.
(c)
CMCS fault messages are only stored when the fault occurs during a flight phase that is in the operational period for that fault or system. In this way, nuisance fault indications that occur due to normal maintenance procedures are not included.
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