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

 (3)  
AMM 28-22-07/401, Fuel Line and Fittings

 (4)  
AMM 28-26-00/201, Defueling

 B.  
Access

 (1)  
Location Zones
 541 Main Tank - Rib No. 5 to No. 17 (Left)
 641 Main Tank - Rib No. 5 to No. 17 (Right)

 (2)  
Access Panels
 541AB Main Tank Access Door (Left)
 641AB Main Tank Access Door (Right)

 C.  
Procedure

 S 654-037
 (1)  
Defuel the applicable left or right main fuel tank
 (AMM 28-26-00/201).

 S 654-038

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

 S 014-001

 (3)  
Remove the applicable left or right main tank access door, 541AB or 641AB (AMM 28-11-01/401).

 S 944-039
 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

BYPASS VALVE
SEE A
END RIB OF
THE FUEL TANK

MOUNTING BRACKET
SUCTION SCREW
FEED LINE WASHER, NUT (EXAMPLE)
COUPLING
BYPASS VALVE
FWD OUTBD
FLANGE
SUCTION FEED LINE
FILTER SCREEN
MOUNTING
FASTENER

BRACKET
(EXAMPLE)

BYPASS VALVE
(LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE)

A

Bypass Valve of the Fuel Boost Pump Installation
Figure 401

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MAINTENANCE MANUAL

 S 014-040
 (5)  Go into the fuel tank.
 S 014-002
 (6)  Find the bypass valve.
 S 024-041
 (7)  To remove the bypass valve, do the steps that follow: (a) Remove the fasteners from the mounting brackets that attach the suction feed line to the end rib of the fuel tank.
　
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