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A
747-400 MAINTENANCE MANUAL
 (b)
BMS 10-20 Type II primer (AMM 28-11-00/801). S 414-010

 (8)
Install the surge tank access door (AMM 28-11-03/401).

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 1.

2.

3.

A
747-400 MAINTENANCE MANUAL
 WING SURGE TANK FLAME ARRESTER - REMOVAL/INSTALLATION
_____________________________________________________General
_______
 A.  This section supplies instructions for the removal and the installation of the surge tank flame arrester.
 B.  The surge tank flame arrester is found in the fuel vent tube. The fuel vent tube is found in the wingtip dry bay immediately outboard of the surge tank.
 C.  The access to the flame arrester is through the access panel 556AB or 656AB.
 TASK 28-13-09-004-001
Wing Surge Tank Flame Arrester Removal (Fig. 401)

______________________________________

 A.  References
 (1)  
IPC 28-13-09, Fig. 2

 B.  
Access

 (1)  
Location Zone
 556 Dry Bay, Front Spar to Rear Spar, Left
 656 Dry Bay, Front Spar to Rear Spar, Right

 (2)  
Access Panel
 556AB Wingtip Dry Bay Access Door
 656AB Wingtip Dry Bay Access Door

 C.  
Procedure

 S 014-002
 (1)  
Remove the access door 556AB or 656AB to get access to the wingtip dry bay.

 S 034-003

 (2)
Disconnect the bonding jumper and the clamp from the vent tube.

 S 034-004

 (3)  
Loosen the vent tube couplings (2 places).

 S 034-012

 (4)  
Remove the tube and flame arrester.

 (a)  
Discard the O-rings.

 S 024-005
 (5)  Remove the flame arrester from the vent tube.
 TASK 28-13-09-404-006
Wing Surge Tank Flame Arrester Installation (Fig. 401)

___________________________________________

 A.  Consumable Materials
 (1)  
D00128 Petrolatum - Technical, VV-P-236

 B.  
References

 (1)  
20-11-15/401, Bonding Jumpers and Ground Leads

 (2)  
IPC 28-13-09, Fig. 2

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A
747-400
MAINTENANCE MANUAL

WING SURGE TANK
FLAME ARRESTER

Wing Surge Tank Flame Arrester Installation
Figure 401

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G54722
A
747-400
MAINTENANCE MANUAL

 C. Access
 (1)  
Location Zone
 556 Dry Bay, Front Spar to Rear Spar, LH
 656 Dry Bay, Front Spar to Rear Spar, RH

 (2)  
Access Panel
 556AB Wingtip Dry Bay Access Door
 656AB Wingtip Dry Bay Access Door

 D.
Procedure

 S 424-007
 CAUTION: DO NOT CAUSE DAMAGE TO THE HONEYCOMB CORE OF THE FLAME ARRESTER
_______ DURING INSTALLATION. THE FIT IS TIGHT AND THE FLAME ARRESTER CAN BE DAMAGED.
　
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