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A
747-400 MAINTENANCE MANUAL
 S 864-020
 (3)  
Close these circuit breakers:

 (a)  
On the main power distribution panel, P6:
 1) 6F20, FLT DK LIGHTS PILOTS MISC IND 2
 2) 6F26, FLT DK LIGHTS F/O IND
 3) 6F27, FLT DK LIGHTS F/O IND & DGTL DSPL
 4) 6L14, FUEL XFEED VALVE ENG 1
 5) 6L15, FUEL XFEED VALVE ENG 2
 6) 6L16, FUEL XFEED VALVE ENG 3
 7) 6L17, FUEL XFEED VALVE ENG 4

 (b)  
On the DC power distribution panel, P180:
 1) 180E2, OVRD/JTSN PUMP CONT L
 2) 180E3, FUEL OVRD/JTSN PUMP CONT FWD 2 & 3
 3) 180E4, PUMP CONT BST 1 AFT 4 FWD
 4) 180E18, FUEL OVRD/JTSN PUMP CONT AFT 2 & 3
 5) 180E19, PUMP CONT BOOST 1 FWD 4 AFT
 6) 180H4, PUMP CONT BST 2 AFT 3 FWD
 7) 180H18, OVRD/JTSN PUMP CONT R
 8) 180H19, PUMP CONT BOOST 2 FWD 3 AFT

 (c)  
On the left power distribution center, P414:
 1) 414E24, MN-AFT PUMP CONT BOOST 2

 S 714-016
 (4)  
Do these two tasks in this procedure: Engine Fuel-Feed System (AMM 28-22-00/501).

 (a)  
Fuel Crossfeed Valves - Operational Test.

 (b)  
Fuel Pumps - Operational Test.

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A

747-400
MAINTENANCE MANUAL

FUEL MANAGEMENT CONTROL MODULE, M154
SEE A
QUARTER-TURN FASTENERS (4 LOCATIONS)
FUEL  FUEL 
1  X FEED  2  3  X FEED  4
VALVE  VALVE  L  CTR  R  VALVE  VALVE 
a  a  a  a 
w  w  ON  w  ON  w  w  w 
PRESS  PRESS 
a  a 
MAIN 1  OVRD 2 MAIN  MAIN 3 OVRD  MAIN 4 
ON  F  ON  ON  ON  ON  F  ON 
w  W  w  w  w  w  W  w 
a PRESS  D  a PRESS  a PRESS  a PRESS  a PRESS  D  a PRESS 
ON  A  ON  ON  ON  ON  A  ON 
w  F  w  w  w  w  F  w 
a PRESS  T  a PRESS  a PRESS  a PRESS  PRESS a  T  a PRESS 

FUEL MANAGEMENT CONTROL MODULE, M154
A

Fuel Management Control Module, M154
Figure 401

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F21292
A
747-400 MAINTENANCE MANUAL
 MAIN TANK BOOST PUMP REMOVAL CHECK VALVE - REMOVAL/INSTALLATION
______________________________________________________________
 1.  General_______
 A.  This procedure contains instructions to remove and install the removal check valve for the main tank boost pumps.
 B.  The removal check valve is installed in each main tank boost pump housing, found in the inboard and outboard main tanks.the check valve is a spring-loaded poppet type valve located in the inlet tube.
 C.  Access to the removal check valves is through the applicable fuel tank access doors in the inboard and outboard main tanks.
 TASK 28-22-18-004-001
 2.  Removal Check Valve Removal (Fig. 401)___________________________
 A.  References
 (1)
AMM 28-11-00/201, Fuel Tanks
　
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