(10)
 For the discharge check valve of the fuel override pumps, install the center tank access door, 134AZ (AMM 28-11-02/401).

 S 414-026

 (11)
 For the discharge check valves of the fuel boost pumps, install the center tank access door, 531AB or 631AB (AMM 28-11-02/401).

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757 MAINTENANCE MANUAL
 FLOAT-OPERATED SHUTOFF VALVE - REMOVAL/INSTALLATION
___________________________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first task removes the float-operated shutoff valve. The second task installs the float-operated shutoff valve.
 TASK 28-22-10-004-001
 2.  Remove the Float-Operated Shutoff Valve (Fig. 401)
_______________________________________
 A.  References
 (1)
AMM 28-11-00/201, Fuel Tanks

 (2)
AMM 28-11-01/401, Main Tank Access Door

 (3)
AMM 28-26-00/201, Defueling

 B.  
Access

 (1)  
Location Zone 541 Main Tank - Rib No. 5 to No. 17 (Left)

 (2)  
Access Panel
 541AB Main Tank Access Door (Left)

 C.  
Procedure

 S 654-002
 (1)
Defuel the left main fuel tank (AMM 28-26-00/201).

 S 654-003

 (2)
Drain and purge the left main fuel tank (AMM 28-11-00/201).

 (3)
Remove the left main tank access door, 541AB (AMM 28-11-01/401).

 S 014-004
 S 944-016
 WARNING: OBEY THE FUEL TANK ENTRY PRECAUTIONS (AMM 28-11-00/201).
_______ FAILURE TO OBEY THE FUEL TANK ENTRY PRECAUTIONS COULD CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (4) Obey the fuel tank entry precautions (AMM 28-11-00/201).
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757
MAINTENANCE MANUAL

BRACKET JUMPER
FLOAT-OPERATED SHUTOFF VALVE (VIEW AS YOU LOOK DOWN)
　
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