(4)  
AMM 28-26-00/201, Defueling

 B.  
Access

 (1)  
Location Zones
 133 Wing Center Section (Left)
 134 Wing Center Section (Right)
 531 Center Wing Tank (Left)
 631 Center Wing Tank (Right)

 (2)  
Access Panels
 134AZ Center Tank Access Door (Right)
 134BZ Baffle Door
 134CZ Baffle Door
 134DZ Baffle Door
 531AB Center Tank Access Door (Left)
 631AB Center Tank Access Door (Right)

 C.  
Procedure

 (1)  
Defuel the center fuel tank (AMM 28-26-00/201).

 S 654-002
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757
MAINTENANCE MANUAL

FUEL BOOST PUMP SEE A
FUEL BOOST PUMPSEE A
FUEL BOOST FUEL OVERRIDEPUMP PUMP
SEE A SEE A
2. NUT
(4 LOCATIONS)  6. SCREW 
3. WASHER  (4 LOCATIONS) 
1. PRESSURE  (EXAMPLE) 
SENSOR  4. VALVE 
LINE  FLANGE 
24. BOLT 
22. WASHER  7. PUMP 
DISCHARGE 
21. BONDING  LINE 
JUMPER 
20. WASHER 
19. WASHER  5. O-RING 

17. NUT 8. DISCHARGE16. O-RING CHECK VALVE
15. RING
14. O-RING
13. PRESSURE SENSOR LINE ADAPTER
12. O-RING
REAR SPAR (DRY SIDE)
11. WASHER (4 LOCATIONS)
10. NUT (4 LOCATIONS)
9. HOUSING
FUEL BOOST PUMP OR FUEL OVERRIDE PUMP A Discharge Check Valve Installation Figure 401
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757
MAINTENANCE MANUAL

 S 654-029
 (2)  For the discharge check valve for the right main tank boost pumps or the right override pump, defuel the right main tank (AMM 28-26-00/201).
 NOTE: You can move the fuel to the left main fuel tank to do
____
 this if it has sufficient capacity for the fuel.

 S 654-031
 (3)  For the discharge check valve for the left main tank boost pumps or the left override pump, defuel the left main tank (AMM 28-26-00/201).
 NOTE: You can move the fuel to the right main fuel tank to do
　
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