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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(2) Access Panel
119BL Main Equipment Center
D. Show the Last Flight Faults
S 712-007
(1) Do the "Energize the MCDP and Do the Self-Test" procedure.
NOTE: Last Flight Faults shows the faults kept by the MCDP
____ the last time the MCDP was automatically turned on at touchdown. If the Flight Faults Mode is engaged on the ground, the MCDP shows "LAST FLT FAULT?". Push the "YES/ADV" button to show a fault that was found during the last flight. Each time the "YES/ADV" switch is pushed, a different fault will show until all of the faults have been shown. The display will then show "ALL LAST FLT FAULTS DSPLY".
S 982-008
(2) Push the NO/SKIP switch to go out of Last Flight Faults.
NOTE: If no faults are found, the message that shows after the
____ YES/ADV switch is pushed will be "NO LAST FLT FAULT".
E. Show the Previous Flight Faults
S 712-009
(1) The Previous Flight Faults shows the flight faults kept from flights before the the last flight. When the MCDP shows the message "ALL LAST FLT FAULT DSPLY" or "NO LAST FLT FAULT", push either YES/ADV or NO/SKIP to view the Previous Flight Faults.
NOTE: When you go into Previous Flight Faults, the message "PREV
____ FLT FAULT?" shows. The MCDP will show faults from the flight before the last the same as with Last Flight Faults messages. The same messages for all previous faults and no previous faults before are shown as applicable. The Previous Flight Faults gives historical flight data. Faults from up to 99 flights are kept in the MCDP unless more than 10 flights have had faults. Faults for a specified flight are kept together and given a number (02 = two flights before, 05 = 5 flights before; etc.). Flight numbers are not used if the flight had no faults.
S 982-010
(2) To show subsequent Previous Flight Faults, push the YES/ADV switch.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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757 MAINTENANCE MANUAL
TASK 22-00-02-742-011
4. Ground Test___________
A. General
(1)
The Ground Test Mode gives a sequence of different tests to make sure specified parts of the Autopilot/Flight Director System (AFDS) and Thrust Management System (TMS) are satisfactory. Some of the tests are part of the AFDS Adjustment/Test (MM 22-10-00) and the TMS Adjustment/Test (MM 22-32-00). Others tests are specified by different Removal/Installation procedures and Maintenance Practices. The ground tests can also be used to make sure AFDS components are OK before takeoff. After the MCDP has been energized and the self-test done, the MCDP will automatically go into the flight faults mode. Push the GRD TEST switch to go into the Ground Test Mode.
(2)
The tests are given by number sequence. The tests can be done by themselves or in a different sequence if the applicable steps to prepare for the test have been done.
(3)
The MCDP can be put into GRD TEST MODE after the MCDP has been manually energized. The GRD TEST MODE program tells the FCC's and the TMC to do self-tests. The MCDP tells each computer to to make sure its interfaces are OK. The results of the self-tests and interface tests are kept by the MCDP for future reference. The MCDP makes sure the self-tests and interface test results are OK every time a ground test is done. A computer that is not OK and is necessary to do the specified test is shown. The test can still be done, but not for the channel of the bad computer. The MCDP then shows interface faults kept by the MCDP that effect the specified test. Leave the GRD TEST MODE and then go into GRD TEST MODE again to bring the data up to date. When a GND TEST fault is corrected, you must go to the FLT FAULTS MODE and then go back into the GRD TEST MODE to remove that fault from the MCDP.
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