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A
747-400 MAINTENANCE MANUAL
S 864-048
(7) Remove the electrical power, if it is not necessary (Ref 24-22-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
EQUIPMENT COOLING CARD - REMOVAL/INSTALLATION
_____________________________________________
1. General
_______
A. This procedure has instructions to remove and install the PC card for the equipment cooling system. The card is installed in the forward electrical systems card file, M7603.
TASK 21-58-05-004-001
2. Equipment Cooling Card Removal (Fig. 401)
______________________________
A. References
(1)
20-41-01/201, Electrostatic Discharge Sensitive Devices
(2)
IPC 73-21-80 Fig. 1
(3)
WDM 21-58-01, 21-58-03, 45-45-04
(4)
SSM 21-58-09
B. Access
(1) Location Zone 115 Area Between Nose Gear Well and Fuselage, LH
C. Remove the Card
S 864-002
(1) Open this circuit breaker, on the P6 Main Power Distribution Panel, and attach a DO-NOT-CLOSE tag:
(a) 6L8, E/E COOLING PCA
S 024-013
CAUTION: USE THE REFERENCED PROCEDURE TO REMOVE THE EQUIPMENT COOLING
_______ CARD. IF YOU DO NOT DO THE PROCEDURE CORRECTLY, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT AND INJURY TO PERSONS.
(2) Remove the equipment cooling card from the forward electrical systems card file, M7603 (Ref 20-41-02/201).
TASK 21-58-05-404-004
3. Equipment Cooling Card Installation (Fig. 401)
___________________________________
A. References
(1) 20-41-01/201, Electrostatic Discharge Sensitive Devices
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
M7603 FWD ELECTRICAL SYSTEMS CARD FILE
SEE A
EQUIPMENT COOLING CARD
A
Equipment Cooling Card Figure 401
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21-58-05
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(2)
21-58-00/501, Equipment Cooling System
(3)
IPC 73-21-80 Fig. 1
(4)
WDM 21-58-01, 21-58-03, 45-45-04
(5)
SSM 21-58-09
B. Access
(1) Location Zone
115 Area Between Nose Gear Well and Fuselage, LH
C. Install the Card
S 424-012
CAUTION: USE THE REFERENCED PROCEDURE TO INSTALL THE EQUIPMENT COOLING
_______ CARD. IF YOU DO NOT DO THE PROCEDURE CORRECTLY YOU CAN CAUSE DAMAGE TO THE EQUIPMENT AND INJURY TO PERSONS.
(1) Install the equipment cooling card in the forward electrical systems card file, M7603 (Ref 20-41-02/201).
D. Do the Installation Test for the Card
S 864-006
(1)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel:
(a) 6L8, E/E COOLING PCA
(2)
Do the NORM Mode Ground Test (Ref 21-58-00/501).
S 744-010
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