(2)
SSM 30-41-01, SSM 30-41-02
(3)
WDM 30-41-11, WDM 30-41-12
CONTROL UNITS
Window Heat Control Unit Installation Figure 401
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30-41-01
ALL ú ú 01 Page 401 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
B. Access
(1) Location Zone
117 Main Equipment Center, LH
118 Main Equipment Center, RH
C. Record of Shop Faults (Optional)
S 864-026
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-027
(2)
Get access to SHOP FAULTS from the CMC main menu (AMM 45-10-00/201).
S 974-028
(3)
Make a record of shop faults for the left or right window heat control unit:
(a)
Select <30 ICE AND RAIN from the shop faults menu.
(b)
Select WINDOW HEAT-L or WINDOW HEAT-R for the left or right window heat control unit.
NOTE: Window Heat Control Unit S283U003-4:
____ In the SHOP FAULTS DATA page for the WHCU-L or WHCU-R, it is necessary to wait 6 seconds between each push of the NEXT PAGE or PREV PAGE key.
(c) Make a record of any shop faults which show.
S 864-029
(4) Remove electrical power (AMM 24-22-00/201).
D. Removal Procedure
S 864-002
(1) Open these circuit breakers:
(a)
P6, Main Power Distribution Panel
1) 6B34, WINDOW HEAT 1L
2) 6B17, WINDOW HEAT 1R
(b)
P180, DC Power Distribution Panel
1) 180H26, WINDOW HEAT CONT 1L
2) 180H12, WINDOW HEAT CONT 1R
S 024-003
(2) Remove the window heat control unit from the shelf.
TASK 30-41-01-404-004
3. Install the Window Heat Control Unit (Fig. 401)
_______________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 30-41-00/501, Flight Compartment Window Anti-Ice System
(3)
SSM 30-41-01, SSM 30-41-02
(4)
WDM 30-41-11, WDM 30-41-12
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30-41-01
ALL ú ú 01 Page 402 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
B. Access
(1) Location Zone
117 Main Equipment Center, LH
118 Main Equipment Center, RH
C. Installation Procedure
S 424-005
(1)
Install the window heat control unit on the shelf.
S 864-006
(2)
Close these circuit breakers:
(a)
P6, Main Power Distribution Panel
1) 6B34, WINDOW HEAT 1L
2) 6B17, WINDOW HEAT 1R
(b)
P180, DC Power Distribution Panel
1) 180H26, WINDOW HEAT CONT 1L
2) 180H12, WINDOW HEAT CONT 1R
D. Window Heat Control Unit Ground Test
S 864-009
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-005
(2)
Set the GND TEST switch on the P461, panel to ENABLE.
S 744-009
(3)
Do a ground test of the window heat control unit (AMM 30-41-00/501):
(a)
Press the left or right WINDOW HEAT switch on the anti-ice/rain removal module (P5, panel) to the ON position.
(b)
Select <GROUND TESTS from the CMC main menu.
(c)
Select <30 ICE AND RAIN from the ground tests menu.
(d)
Select <WINDOW HEAT-1L OR <WINDOW HEAT-1R from the ice and rain menu. 1) Make sure that TEST IN PROGRESS shows on the CDU. 2) Make sure that the INOP light in the left or right WINDOW
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