(b)
Set the INBD CRT switch to the EICAS position.
1) Make sure the inboard IDU shows the EICAS secondary engine format.
(c)
Set the INBD CRT switch to the NORM position.
1) Make sure the inboard IDU shows the ND format.
(d)
Set the LWR CRT switch to the ND position.
1) Make sure the lower IDU shows the ND format.
(e)
Set the LWR CRT switch to the EICAS PRI position.
1) Make sure the lower IDU shows the EICAS primary engine format.
(f)
Set the LWR CRT switch to the NORM position.
1) Make sure the lower IDU shows the EICAS secondary engine format.
S 715-789
(3) Do a test of the first officer's display transfer module:
(a)
Set the INBD CRT switch to the PFD position.
1) Make sure the inboard IDU shows the PFD format.
(b)
Set the INBD CRT switch to the EICAS position.
1) Make sure the inboard IDU shows the EICAS secondary engine format.
(c)
Set the INBD CRT switch to the NORM position.
1) Make sure the inboard IDU shows the ND format.
(d)
Set the LWR CRT switch to the ND position.
1) Make sure the lower IDU shows the ND format.
(e)
Set the LWR CRT switch to the EICAS PRI position.
1) Make sure the lower IDU shows the EICAS primary engine format.
(f)
Set the LWR CRT switch to the NORM position.
1) Make sure the lower IDU shows the EICAS secondary engine format.
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ALL ú ú 01 Page 506 ú Oct 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL
S 715-790
(4) Do a test of the brightness control of the IDUs:
(a)
Adjust the BRT UPR control knob on the EICAS control panel/FMC switch clockwise and counterclockwise. 1) Make sure the upper IDU becomes brighter when you adjust
the knob clockwise. 2) Make sure the upper IDU becomes dimmer when you adjust the knob counterclockwise.
(b)
Adjust the outer BRT LWR control knob on the EICAS control panel/FMC switch clockwise and counterclockwise. 1) Make sure the lower IDU becomes brighter when you adjust
the knob clockwise. 2) Make sure the lower IDU becomes dimmer when you adjust the knob counterclockwise.
(c)
Adjust the OUTBD CRT control knob on the captain's lighting control panel clockwise and counterclockwise. 1) Make sure the captain's outboard IDU becomes brighter when
you adjust the knob clockwise. 2) Make sure the captain's outboard IDU becomes dimmer when you adjust the knob counterclockwise.
(d)
Adjust the outer INBD CRT control knob on the captain's lighting control panel clockwise and counterclockwise. 1) Make sure the captain's inboard IDU becomes brighter when
you adjust the knob clockwise. 2) Make sure the captain's inboard IDU becomes dimmer when you adjust the knob counterclockwise.
(e)
Adjust the OUTBD CRT control knob on the first officer's lighting control panel clockwise and counterclockwise. 1) Make sure the first officer's outboard IDU becomes brighter
when you adjust the knob clockwise. 2) Make sure the first officer's outboard IDU becomes dimmer when you adjust the knob counterclockwise.
(f)
Adjust the outer INBD CRT control knob on the first officer's lighting control panel clockwise and counterclockwise. 1) Make sure the first officer's inboard IDU becomes brighter
when you adjust the knob clockwise. 2) Make sure the first officer's inboard IDU becomes dimmer when you adjust the knob counterclockwise.
S 865-791
(5)
Set the GND TESTS switch on the P461 panel to the NORM position.
S 865-868
(6)
Set the EEC MAINT ENG POWER 1, 2, 3, and 4, switches on the overhead maintenance panel, P461, to the NORM position.
(7)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
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