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 B.  The galley power ELCUs are installed in the four generator power center panels P514, P515, P614, and P615. The panels are in the E/E compartment. Access to the E/E compartment is through the door behind the nose wheel or through the forward cargo compartment.
 TASK 25-31-02-004-001
 2.  Galley Power Electrical Load Control Unit Removal (Fig. 401)_________________________________________________
 A.  References
 (1)
24-22-00/201, Manual Control

 (2)
IPC 24-51-02 Fig. 1

 (3)
IPC 24-51-02 Fig. 2

 (4)
IPC 24-51-02 Fig. 3

 (5)
IPC 24-51-02 Fig. 4

 (6)
WDM 25-31-12, 25-31-22, 25-31-32, 25-31-42

 (7)
SSM 25-31-01, 25-31-02, 25-31-03, 25-31-04

 B.  Access
 (1)  
Location Zone 117 Electrical and Electronics Compartment, LH 118 Electrical and Electronics Compartment, RH

 (2)  
Access Panel
 P514 Generator 1 Power Center - Left
 P614 Generator 2 Power Center - Left
 P515 Generator 3 Power Center - Right
 P615 Generator 4 Power Center - Right

 

 C.  Procedure
 S 864-002
 (1) Make sure all electrical power is off (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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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

SEE  B  C ELCU (M481) GALLEY POWER 1 SEE 
SEE  A  P514 
P614 
GALLEY POWER 3 ELCU (M485) CSEE  A ELCU (M482) GALLEY POWER 2 CSEE 1 AND 2 POWER CENTER - LEFT P514 AND P614 GENERATOR 
P515 
P615  CONNECTOR RECEPTACLE ELECTRICAL
ELCU (M486) GALLEY POWER 4 CSEE 
3 AND 4 POWER CENTER - RIGHT P515 AND P615 GENERATOR 
B 
C Galley Power Electrical Load Control Unit Installation Figure 401  (TYPICAL) ELCU 

G88176
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 ALL  ú ú 01 Page 402 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 024-003
 (2)  Open the applicable panel to get access to the ELCU.
 ~....................................... | Equipment Number | ......................................... | ELCU | Connector | Panel | ......................................... | M481 | DM481 | P514 | | M482 | DM482 | P614 | | M485 | DM485 | P515 | | M486 | DM486 | P615 | 2............….............…............1
 S 034-004
 (3)  
Disconnect the electrical connector from the ELCU.

 S 034-005

 (4)  
Disconnect the electrical leads from the ELCU:

 (a)  
Remove the screws that attach the two terminal covers to the ELCU.

 (b)  
Remove the terminal covers.

 (c)  
Remove the nuts and the washers that attach the electrical leads to the terminal studs on the ELCU.

 (d)  
Attach an identification tag to each electrical lead.

 (e)  
Remove the electrical leads from the terminal studs.

 

 S 024-006
 (5)  Remove the ELCU:
 (a)  
Remove the four screws that attach the ELCU to the panel.

 (b)  
Remove the ELCU from the panel.

 (c)  
Install the terminal washers and the terminal nuts on the ELCU.

 TASK 25-31-02-404-007
 3.  Galley Power Electrical Load Control Unit Installation (Fig. 401)______________________________________________________
 A. References
 (1)  
24-22-00/201, Manual Control

 (2)  
AMM 45-10-00/201, Central Maintenance Computer System

 (3)  
IPC 24-51-02 Fig. 1

 (4)  
IPC 24-51-02 Fig. 2

 (5)  
IPC 24-51-02 Fig. 3

 (6)  
IPC 24-51-02 Fig. 4

 (7)  
WDM 25-31-12, 25-31-22, 25-31-32, 25-31-42
　
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