S 172-004

 (3)  
Clean the applicable fuel tanks (AMM 28-11-00/701) and flush the fuel lines with clean fuel.

 S 032-005

 (4)  
Remove, disassemble, and clean or replace the airplane fuel system components.

 (5)
Install the pump motor and the impeller unit (AMM 28-22-03/401).

 S 412-006
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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A

757 MAINTENANCE MANUAL
 TASK 28-00-00-202-008
 3. Inspection of the Electrical Bonding Jumpers in the Fuel System
________________________________________________________________
 A. General
 (1)  
This task contains visual, mechanical and physical inspections of the electrical bonding jumpers in the fuel system.

 (2)  
The tin plating on the bonding jumper usually supplies a smooth finish. When there is deterioration of the tin plating on the bonding jumper and the copper in the wire reacts with any sulfur compounds in the tank, the finish becomes rough to the touch and the bonding jumper can show signs of fraying.

 B.
References

 (1)  
SWPM 20-20-00, Electrical Bonds and Grounds

 C.
Access

 (1)  
Location Zones
 133 Wing Center Section (left)
 134 Wing Center Section (Right)
 511 Leading Edge To Front Spar (left)
 611 Leading Edge To Front Spar (Right)
 531 Center Wing Tank (Left)

 ú 631 Center Wing Tank (Right) ú
 (2)  Access Panels
 134AZ Center Tanks Access Door (Right)
 134BZ Baffle Door
 134CZ Baffle Door
 134DZ Baffle Door
 511FB Leading Edge Access Panel (Left)
 611FB Center Tank Access Door (Right)
 531AB Center Tank Access Door (Left)

 ú 631AB Center Tank Access Door (Right) ú
 D. Electrical Bonding Jumper Visual Inspection
 S 212-010
 (1)  
Visually inspect the bonding jumper color.

 (a)  
If the bonding jumper is silver in color and does not show a color change, then the bonding jumper is satisfactory.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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 ALL  ú ú 01.1 Page 202 ú Sep 28/02
　
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