A 747-400 MAINTENANCE MANUAL
D633U101-E1

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 CHAPTER 28 - FUEL
 TABLE OF CONTENTS
_________________
 Chapter Section Subject_______ Subject ____ Effectivity
_______ Page ___________
 FUEL 28-00-00
____ Description and Operation 1 ALL General 1 Maintenance Practices 201 ALL Connect the Flexible Full 210 Coupling Connect the Flexible Half 209
 Coupling
 Connect the Rigid Coupling 202
 Examine Fuel System Suspected of 201

 Containing Contaminated Fuel FUEL SYSTEM 28-00-01 Maintenance Practices 201 ALL
 STORAGE - FUEL 28-10-00
______________
 Component Location 101 ALL
 Component Index
 Component Location

 FUEL TANKS 28-11-00
 Description and Operation 1 ALL General 1 Door - Purge, Center Wing Tank 7 Door - Tank Access 1 Fuel Tank Leak Detection 24 Opening - Access, Rib and Spar 3 Port - Overwing Fill 7 Sealing - Fuel Tank 7
 Definition of Sealing Terms 13
 Examples of Seal Planes 14
 Types of Seals 16
 Valve - Baffle Check 7
 Valve - Fuel Sump Drain 3
 PURGING AND FUEL TANK ENTRY 201

 PRECAUTIONS
 28-CONTENTS

 GUN Page 1 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 CHAPTER 28 - FUEL
 TABLE OF CONTENTS
_________________
 Chapter Section Subject_______ Subject ____ Effectivity
_______ Page ___________
 Inspection/Check 601 ALL Leak Check, Air Pressure, Wing 638 Tank Cleaning/Painting 701 ALL Apply the Biocide to the Fuel 705 Tanks Approved Repairs 801 ALL Refuel Operation for the 838 Repaired Fuel Tank Repair of O-Rings and Rubber 839 Seals Replacement of the Molded 842 Rubber Door Seal DOOR - ACCESS, CENTER WING TANK 28-11-01 Removal/Installation 401 ALL DOOR - ACCESS, MID SPAR 28-11-25 Removal/Installation 401 ALL DOOR - ACCESS, RESERVE AND MAIN 28-11-02 TANK Removal/Installation 401 ALL DOOR - ACCESS, SPANWISE BEAM 28-11-09 Removal/Installation 401 ALL DOOR - ACCESS, WING SURGE TANK 28-11-03 Removal/Installation 401 ALL DOOR - PURGE, CENTER WING TANK 28-11-06 Removal/Installation 401 ALL POPPET - PRIMARY, FUEL SUMP 28-11-04 DRAIN VALVE Removal/Installation 401 ALL POPPET - SECONDARY, FUEL SUMP 28-11-07 DRAIN VALVE Removal/Installation 401 ALL PORT - OVERWING FILL 28-11-05 Removal/Installation 401 ALL VALVE - FUEL SUMP DRAIN 28-11-10 Removal/Installation 401 ALL

 28-CONTENTS

 GUN Page 2 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 CHAPTER 28 - FUEL
 TABLE OF CONTENTS
_________________
 Chapter Section Subject_______ Subject ____ Effectivity
_______ Page ___________
 FUEL VENT SYSTEM 28-13-00
 Description and Operation 1 ALL General 1 Arrester - Flame, Surge Tank 7
 Vent
 Scoop - Fuel Vent 9
 Tubing - Vent System 1
 Valve - Check, Surge Tank 7

 Drain
 Valve - Drain, Fuel Vent 7
 Valve - Float, Fuel Vent 7
 Valve - Pressure Relief, Surge 9

 Tank Operation 9 ARRESTER - FLAME, WING SURGE 28-13-09 TANK Removal/Installation 401 ALL TUBE - FUEL VENT, WING SURGE 28-13-03 TANK Removal/Installation 401 ALL VALVE - CHECK, WING SURGE TANK 28-13-04 DRAIN Removal/Installation 401 ALL VALVE - FUEL VENT DRAIN 28-13-01 Removal/Installation 401 ALL VALVE - FUEL VENT FLOAT 28-13-02
 Removal/Installation 401 ALL Fuel Vent Float Valve 401 Valve Poppet and Float 406
 Assembly
 VALVE - PRESSURE RELIEF, WING 28-13-05

 SURGE TANK Maintenance Practices 201 ALL Removal/Installation 401 ALL

 28-CONTENTS

 GUN Page 3 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 CHAPTER 28 - FUEL
 TABLE OF CONTENTS
_________________
 Chapter Section Subject_______ Subject ____ Effectivity
_______ Page ___________
 CENTER WING TANK SCAVENGE SYSTEM 28-15-00
 Hydromechanical Fuel Scavenge 1

 System
 General 1
 Float Valve - In the No. 2 and 3

 No. 3 Main Tanks
 Float Valve - Scavenge, In the 3
 Center Wing Tank
 Fuel Strainer - Scavenge 4
 System
 Housing - Fuel Strainer, Fuel 3
 Scavenge System
 Jet Pump - Fuel Scavenge, 2

 Center Wing Tank Maintenance Practices 201 ALL Adjustment/Test 501 ALL FLOAT VALVE, HYDROMECHANICAL 28-15-11
　
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