(d)  
Repeat these steps for the opposite wing.

 J.
Repair the Leaks

 S 796-202
 (1)  
Use one of the procedures given to find the internal leak source (this procedure is recommended: Air pressure and Bubble Solution).

 (2)
Repair or replace the sealant as necessary (AMM 28-11-00/801).

 (3)  
Do this task: Put the Airplane Back to the Usual Condition.

 S 366-203
 S 866-201
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 TASK 28-11-00-006-285
 7. Individual Wing Fuel Tank - Air Pressure Leak Check (Fig. 611)
___________________________________________________
 A. General
 (1)  
This task uses air pressure to check for tank-to-tank leaks between two adjacent fuel tanks. After air pressure is applied to a single fuel tank, the adjacent tank can be entered and soap solution applied to the tank end structure. Air leaks between the two tanks can be identified by air bubbles in the soap solution.

 (2)  
Use this task after you have done maintenance on the tank end structure between fuel tanks or to troubleshoot tank-to-tank fuel leaks.

 (3)  
Do this procedure before you add fuel to the applicable fuel tanks.

 B.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 27-81-00/201, Leading Edge Flap System

 (3)  
AMM 28-00-00/201, Fuel

 (4)  
AMM 28-11-00/201, Fuel Tanks

 (5)  
AMM 28-11-00/801, Fuel Tanks

 (6)  
AMM 28-11-02/401, Reserve and Main Tank Access Door

 (7)  
AMM 28-11-03/401, Surge Tank Access Door

 (8)  
AMM 28-11-25/401, Mid Spar Access Door

 (9)  
AMM 28-15-00/201, Fuel Scavenge System

 (10)
 AMM 28-21-03/401, Manifold Drain Valve

 (11)
 AMM 28-22-01/401, Engine Fuel Shutoff (Spar) Valve

 (12)
 AMM 28-22-02/401, Fuel-Feed Crossfeed Valve

 (13)
 AMM 28-22-07/601, Engine Fuel-Feed System Fuel Line

 (14)
 AMM 28-25-02/401, APU Fuel Shutoff Valve Actuator

 (15)
 AMM 28-26-00/201, Defueling

 (16)
 AMM 32-00-30/201, Landing Gear Door Locks

 C.
Equipment

 (1)
Air Source - Regulated, Dry Filtered, Compressed 60-105 psig

 (2)  
B28005-28, Door - Pressure test, fuel system (10 x 18 door)

 (3)  
F72951-1, Manometer - Water, test equipment

 (4)  
G28018, Air Pressure Check Equipment

 (5)  
G28019-16 Single Tank Test Equipment

 D.
Consumable Materials

 (1)  
D00128, Petrolatum, VV-P-236

 (2)  
G00557, Non-corrosive soap compound, MIL-L-25567 or bubble bath

 (3)  
Marking Pen (Berol Filmograph or equivalent)

 E.
Access

 (1)  
Location Zones
 130 Center Wing Tank
 452 Nacelle Strut 1 - Torque Box
 500 Wing Structure, Left
 521 Nacelle Strut 1 - Torque Box
 600 Wing Structure, Right

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Not Used
Figure 610

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A77950
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MAINTENANCE MANUAL
　
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