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CHAPTER 28
FUEL
TABLE OF CONTENTS
Subject Subject No.
FUEL............................................................................................................................... 28-00 Description and Operation Maintenance Practices
STORAGE ...................................................................................................................... 28-10-0

Description and Operation
Center Wing Tank
Main Wing Tanks

Maintenance Practices
Biocide Treatment of Fuel Tanks
Purging (Air Ventilation)

Cleaning and Painting
Dye Contaminated Fuel Use

INTEGRAL FUEL TANKS........................................................................................... 28-11-0

Description and Operation
Baffle Check Valves
Causes of Leaks
Filler Cap Assembly
Fuel Sump Drain Valves
Fuel Tank Access Panels
Fuel Tank Sealing
Integral Fuel Tank Leak Detection
Leak Evaluation and Repair Requirements
Methods of Leak Detection
Rib and Beam Access Openings

Trouble Shooting
Locating Leak Source in De-fueled Tank
Localizing External Fuel Leaks -Talcum Powder Method
Determining Nonsealant Leaks
Leak Path Analysis

Cleaning/Painting
Application of Corrosion Resistant Finish
Integral Fuel Tank Cleaning, Fungus and Corrosion Removal

Approved Repairs
Cause of Leaks
Examination and Closure of Repaired Fuel Tanks
Fueling Repaired Integral Fuel Tanks
Leak Evaluation and Repair Requirements
Nonsealant Leaks Approved Repairs
Repair of Sealant Leaks in Tank Structure
Secondary Fuel Barrier Sealant Approved Repairs

Wing Fuel Tank Access Panel................................................................................. 28-11-11 Removal/Installation Approved Repairs
Wing Fuel Sump Drain Valve................................................................................... 28-11-21 Removal/Installation
508 Sep 01/02 Contents 28 Page 1 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

Subject Subject No.
Integral Center Tank Access Panel ......................................................................... 28-11-31 Removal/Installation
Integral Center Tank Sump Drain Valve .................................................................. 28-11-41 Removal/Installation
Overwing Fill Port..................................................................................................... 28-11-71 Removal/Installation
FUEL VENT SYSTEM................................................................................................. 28-13-0 Description and Operation APU Fuel Line Shroud Drain Fuel Vent Float Valve Fuel Vent Scoop Vent Ducts Vent Surge Tank Vent System Sealing Inspection/Check
Fuel Vent Float Valve............................................................................................... 28-13-11 Removal/Installation
Center Wing Cavity.................................................................................................. 28-13-21 Inspection/Check
AUXILIARY FUEL TANK............................................................................................. *[4] 28-14-0 Description and Operation Auxiliary Fuel Tank Access Panels Auxiliary Fuel Tank Cavity Auxiliary Fuel Tank Fuel Lines Auxiliary Fuel Tank Vent Lines Removable Fuel Cells Trouble Shooting Maintenance Practices Deactivate/Reactivate Auxiliary Fuel Tank Inspection/Check
Auxiliary Fuel Tank Access Panels.......................................................................... *[4] 28-14-11 Removal/Installation
Auxiliary Fuel Tank Fuel Cells ................................................................................. *[4] 28-14-21 Storage Removal/Installation Inspection/Check Approved Repairs
Fuel Vent Float Valve............................................................................................... *[4] 28-14-31 Removal/Installation
Sump Drain Bellows................................................................................................. *[4] 28-14-41 Removal/Installation
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Contents 28 Page 2  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Apr 01/97 

Subject Subject No.
DISTRIBUTION
PRESSURE FUELING................................................................................................ 28-21-0

Description and Operation
　
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