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A
747-400 MAINTENANCE MANUAL
 REFUEL CONTROL PANEL - REMOVAL/INSTALLATION
___________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task removes the refuel control panel, P42. The second task installs the refuel control panel.
 B.  The refuel control panel is found outboard of the refuel station on the left wing. To get to the refuel control panel, you must open access door 521CB.
 C.  After the installation, it is necessary to refuel the airplane to make sure the refuel control panel operates correctly.
 D.  When you extend the leading edge flaps, install the safety locks.
 TASK 28-21-16-004-001
 2.  Refuel Control Panel, P42, Removal (Fig. 401)__________________________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 27-81-00/201, Leading Edge Flap System

 (3)  
AMM 28-41-04/401, Fuel Quantity Indicator

 (4)  
AIPC 28-21-04 Fig. 2

 B.  
Access

 (1)  
Location Zones
 521 Leading Edge to Front Spar, Left

 (2)  
Access Panels
 521BB Refuel Station Access Door
 521CB Refuel Control Panel Access Door

 C.  
Procedure

 S 864-005
 (1)  
Supply the electrical power (AMM 24-22-00/201).

 S 864-002

 (2)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
On the main power distribution panel, P6: 1) 6D05, FUEL QTY 1 2) 6D06, FUEL QTY 2 3) 6F05, FUEL SYS MGMT CARD A 4) 6F06, FUEL SYS MGMT CH 1 5) 6F07, FUEL SYS MGMT CARD B 6) 6F08, FUEL SYS MGMT CH 2

 (b)  
On the DC power distribution panel, P180: 1) 180M8, FUELING VALVE 2 2) 180M9, FUELING PWR - HOT BAT 3) 180C25, FUELING LTS PANEL 4) 180C26, FUELING LTS RECP

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A
747-400
MAINTENANCE MANUAL

REFUEL RECEPTACLES  PANEL, P42 REFUEL CONTROL 
SEE  A  SEE  A 
REFUEL RECEPTACLE (REF)  REFUEL RECEPTACLE (REF)  SEE B PANEL, P42 REFUEL CONTROL 
A  ACCESS DOOR, 521CB FUELING CONTROL PANEL A 

CENTER MAIN 2 MAIN 1
RESERVE 2
MAIN 3
A  PANEL CONTROL REFUEL  SEE C FASTENERS BONDING JUMPER  BONDING JUMPERS 
REFUEL CONTROL PANEL, P42 
B 
Figure 401 (Sheet 1) Refuel Control Panel 

E23545
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
ELECTRICAL

BONDING JUMPER FASTENERS
MAKE SURE THERE IS A MINIMUM
0.5 INCH CLEARANCE BETWEEN THE REFUEL CONTROL PANEL WIRE BUNDLES AND THE AIR DUCT.

Refuel Control Panel Figure 401 (Sheet 2)
E23608
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A
747-400 MAINTENANCE MANUAL
 5) 180H17, FUEL SYS EICAS INTFC CONT
 (c)  
On the left power distribution center, P414:
 1) 414F17, FUELING VALVE
 2) 414F22, FUELING PWR

 (d)  
On the right power distribution center, P415:
 1) 415M14, OVERFILL CONT

 

 S 864-003
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LEADING
_______ EDGE AND TRAILING EDGE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
　
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