TITLE BLOCK FIVE INCH CRT, FOURTEEN 24-CHARACTER
1R
2R
3R
4R
5R
6R
ANNUNCIATORS
ANNUNCIATORS
REMOVAL/INSTALLATION
Flight Management Computer System Control Display Unit
Figure 501
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(b)
(c)
(d)
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737-300/400/500MAINTENANCE MANUAL
2) Push LSK 6R (MAINT>). a) Make sure that the CDU shows the MAINT BITE INDEX 1/1
page.Do these steps to operate the IRS BITE. 1) Push LSK 4L (<IRS).
a) Make sure that the CDU shows the IRS BITE TEST page.Do these steps to examine the IRS current faults. 1) Push LSK 1L (<IRS L).
a) Make sure that the CDU shows the IRS BITE TEST - IRS L INDEX page. 2) Push LSK 2L (<CURRENT FAULTS). a) Make sure that the CDU shows the IRS BITE TEST -CURRENT FAULTS L page.
b) Make sure that the CDU shows:
IRU OK
DAA OK
DADC OK
3) Push LSK 6L (<INDEX) two times. a) Make sure that the CDU shows the IRS BITE TEST page. 4) Push LSK 2L (<IRS R). a) Make sure that the CDU shows the IRS BITE TEST - IRS R INDEX page. 5) Push LSK 2L (<CURRENT FAULTS). a) Make sure that the CDU shows the IRS BITE TEST -CURRENT FAULTS R page.
b) Make sure that the CDU shows:
IRU OK
DAA OK
DADC OK
6) Push LSK 6L (<INDEX) two times.
a) Make sure that the CDU shows the IRS BITE TEST page.Do these steps to examine the IRS Interfaces. 1) Set the SYS DSPL switch on the ISDU to the L position. 2) Push LSK 1L (<IRS L).
a) Make sure that the CDU shows the IRS BITE TEST - IRS L INDEX page.
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3)
4)
5)
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737-300/400/500MAINTENANCE MANUAL
Push LSK 3L (<INTERFACE CHECK).
a) Make sure that the CDU shows the IRS BITE TEST -
INTERFACE CHECK L 1/4 page.Push LSK 5L (<TEST START) to start the L IRU interface check.
NOTE: Press LSK 5L (<TEST STOP) to stop the test.
____ It may be necessary to do this test several times to view all reactions of the test.
To repeat this test:
-
Press LSK 5L (<TEST STOP).
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Press LSK 6L (<INDEX). Make sure that the IRS BITE TEST - IRS L INDEX page is displayed.
-
Press LSK 3L (<INTERFACE CHECK). Make sure that the IRS BITE TEST - INTERFACE CHECK L 1/4 page is displayed.
-
Press LSK 5L (<TEST START).
a) Make sure that for the first 2 seconds:
1. The ALIGN, FAULT, ON DC, and DC FAIL lights on the
_ left side of the MSU illuminate. b) Make sure that for the next 8 seconds:
1.
The ATT flag on the captain's ADI comes into view.
_
2.
The HDG flag on the captain's HSI comes into view.
_
3.
The HDG flag on the captain's RDDMI comes into
_
view.Push the NEXT PAGE key on the CDU to move the display to page 2/4 of this test. a) Make sure that the pitch angle shown on the captain's
ADI agrees with the IRU output. b) Make sure that the roll angle shown on the captain's ADI agrees with the IRU output. c) Make sure that the yaw rate (rate of turn) shown on the captain's ADI agrees with the IRU output.
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737-300/400/500MAINTENANCE MANUAL
6) Set the DSPL SEL switch on the ISDU to the HDG/STS position. a) Make sure that the true heading shown on the ISDU
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