feet/minute.
(e)
Set the IRS TRANSFER SWITCH on the P5-28 panel to the NORMAL position.
(f)
Release the DSPL SEL switch on the ISDU. 1) Make sure that all of the annunciators on the MSU are off.
(g)
Set the SYS DSPL switch on ISDU to the R position.
(h)
Set and hold the DSPL SEL switch on the ISDU in the TEST position.
NOTE: Release the DSPL SEL switch from the TEST position and
____
it goes back to the TK/GS position.
Release the switch to stop the test.
You will possibly have to do this step again to see all effects of the test.
1) For seconds 0-2, make sure that: a) The ISDU display comes on. b) The ALIGN, FAULT, ON DC, and DC FAIL annunciators on
the right side of the MSU are on. c) The IRS master caution light on the first officer's side of the pilot's lightshield comes on. 2) For seconds 2-10, make sure that: a) The FAULT, ON DC, and DC FAIL annunciators on the right side of the MSU turn off. b) The IRS master caution light on the first officer's
side of the pilot's lightshield turns off. c) The display on the ISDU turns off. d) The HDG flag on the first officer's EHSI comes into
view. e) The HDG flag on the first officer's RDDMI comes into view.
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f) The ATT flag on the first officer's EADI comes into view. g) The flag on the first officer's VSI comes into view. 3) For seconds 10 and on, make sure that: a) The pitch display on the first officer's EADI reads 5 degrees pitch up. b) The roll display on the first officer's EADI reads 45
degrees roll right. c) The first officer's EHSI heading reads 15 degrees. d) The first officer's RDDMI heading reads 15 degrees. e) The first officer's VSI reads -600 feet/minute.
(i)
Set the IRS TRANSFER SWITCH on the P5-28 panel to the BOTH ON RIGHT position. 1) Make sure that the captain's VSI reads -600 feet/minute.
(j)
Set the IRS TRANSFER SWITCH on the P5-28 panel to the NORMAL position.
(k)
Release the DSPL SEL switch on the ISDU. 1) Make sure that all of the annunciators on the MSU are off.
F. Built-In Test Equipment (BITE) Test of the IRS
S 865-095
(1)
Set the IRS TRANSFER SWITCH on the P5-28 panel to the NORMAL position.
S 865-051
(2)
Set the switches on the MSU to the ALIGN or NAV position.
S 865-086
(3)
Make sure that the mode switch on the left and right EFIS control panels is in a VOR/ILS position.
S 745-052
(4)
Do these steps to operate the IRS BITE.
NOTE: For illustrations of IRS BITE CDU displays, refer to 22-05.
____
NOTE: CDU data lines that permit a selection are identified with a
____ caret (< or >). The CDU has 12 line-select keys. Six keys are on each side of the display. 1L thru 6L are on the left side and 1R thru 6R are on the right side.
(a) Do these steps to access the MAINT BITE INDEX 1/1 page on the CDU. 1) Push the INIT/REF key on the CDU. 2) Push LSK 6L (<INDEX) on the CDU.
a) Make sure that the CDU shows the INIT/REF INDEX 1/1 page.
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(c)
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3) Push LSK 6R (MAINT>). a) Make sure that the CDU shows the MAINT BITE INDEX 1/1 page. 4) Push LSK 4L (<IRS).
a) Make sure that the CDU shows the IRS BITE INDEX page.Do these steps to examine IRS current faults. 1) Push LSK 1L (<IRS L).
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