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747-400
MAINTENANCE MANUAL
Apply an Injection Seal
Figure 814
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747-400 MAINTENANCE MANUAL
TERMINAL FITTING
WING RIB WING SPAR
PREPACK SEAL CORNER FITTING
IS UNDER THE
FITTING 1
FILLET SEAL ALONG
STRUCTURAL JOINTS
PREPACK SEAL
IS UNDER THE
FITTING
LOWER WING SKIN
FWD
INBD
1 THE FITTING MUST BE TEMPORARILY REMOVED AND CLEANED OF USED SEALANT BEFORE YOU APPLY A NEW PREPACK SEAL
Example of a Combination of Prepack Seal and Fillet Seals
Figure 815
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L48368
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747-400
MAINTENANCE MANUAL
AFTER ASSEMBLY
AFTER ASSEMBLY
Mating Surface Seal Figure 816
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MAINTENANCE MANUAL
Lift the Seal Plane to Repair a Bad Prepack Seal
Figure 817
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MAINTENANCE MANUAL
(2)
Gun - Sealant
(commercially available)
(3)
Tool (or alternative tool)
(a)
F70230-1 Tool - Rivet repair, temporary, self sealing rivets, fuel system (recommended)
(b)
J28006-1 Tool - Sealing, Fuel Tank Rivet (alternative)
D.
Consumable Materials
(1)
A00436 Sealant, Fuel Tank, manganese cure, 2 part - BMS 5-26, Type II
(2)
A00767 Sealant, Low density integral fuel tank, 2 part, RT cure -BMS 5-45
(3)
A01019 Sealant, Integral Fuel Tank (Quick Repair) - MIL-S-83318
(4)
B01013 Solvent, Final Cleaning Prior to Fuel Tank Sealing
(AMM 20-30-93/201 or SOPM 20-30-93) - Series 93
(5)
C00064 Coating, Aluminum chemical conversion - BAC5719, Type II, Class A (MIL-C-5541, Class A)
(6)
C00307 Coating, Corrosion resistant finish for integral fuel tanks -BMS 10-20, Type II
E.
Prepare for Fuel Tank Repair
S 658-229
(1) For the applicable fuel tank, do this task: Fuel Tank Defueling (AMM 28-26-00/201).
S 658-230
WARNING: OBEY THE PURGING AND FUEL TANK ENTRY PROCEDURE PRECAUTIONS.
_______ FAILURE TO OBEY THE PURGING AND FUEL TANK ENTRY PROCEDURE PRECAUTIONS COULD CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2) Do this task: Purging and Fuel Tank Entry (AMM 28-11-00/201).
S 868-228
WARNING:_______MAKE SURE YOU HAVE A GOOD FLOW OF AIR IN THE AREA. OBEY ALL FIRE SAFETY PRECAUTIONS. POISONOUS AND FLAMMABLE MATERIALS AR USED THAT CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3)
It is necessary to use materials that are poisonous and flammable when you repair the sealant. You must have a good flow of air in the area. You must obey all fire safety precautions.
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