737-300/400/500MAINTENANCE MANUAL
Consumable Materials
 (1)
G00835 - Bubble solution, to detect leaksReferences

 (1)  
AMM 28-10-00/201, Fuel Storage

 (2)  
AMM 28-11-11/401, Wing Fuel Tank Access Panels

 (3)
AMM 28-11-31/401, Center Tank Access PanelAccess

 (1)  
Location Zones 221 Center Section Fuel Tank 304 Left Fuel Vent Surge Tank 305 Left Fuel Tank 404 Right Fuel Vent Surge Tank 405 Right Fuel Tank

 (2)  
Access Panels 7101 Surge Tank Access Door 7102 Surge Tank Vent Scoop Door 7202 Fuel Tank Access Door 7214 Fuel Tank Access Door 7402 Fuel Tank Access Door 7414 Fuel Tank Access Door 7501 Surge Tank Access Door 7502 Surge Tank Vent Scoop Door

Prepare the Vent System for the No. 1 Tank or the No. 2 Tank for the Pressure Check (Fig. 601)
 S 656-001
 WARNING: CAREFULLY DO ALL OF THE SAFETY PROCEDURES TO DEFUEL THE FUEL
_______ TANKS AND TO PREPARE TO GO INTO THEM. AN EXPLOSION, BAD INJURY TO PERSONS, AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  
Prepare to go into the surge tank and the main tank on the side of the airplane where you must do the check (AMM 28-10-00/201).

 S 016-003

 (2)  
Remove these access panels for the applicable wing fuel tank (AMM 28-11-11/401):

 (a)  
The access panel, No. 1, for the main tank

 (b)  
The access panel, No. 12, for the main tank

 (c)  
The access panel, No. 13, for the main tank

 (d)  
The access panel, No. 14, for the surge tank.

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737-300/400/500MAINTENANCE MANUAL
 S 496-004
 CAUTION:_______ ATTACH RED SAFETY STREAMERS TO ALL OF THE PLUGS AND THE COVERS
 THAT YOU USE TO CLOSE THE VENT OPENINGS.  BAD DAMAGE TO THE
 AIRPLANE STRUCTURE WILL OCCUR IF YOU DO NOT REMOVE ALL OF THE

 TEST EQUIPMENT AFTER THE PRESSURE CHECK.
 (3)  
Attach the safety streamers to all of the covers and the closure plugs before you install them.

 S 016-005

 (4)  
Go into the wing tank through the access panel, No. 1 and the applicable rib access openings.

 S 486-006

 (5)  
Install one of the plug assemblies, F80080-29, for the crossover vent tube in the inboard end of the vent.

 NOTE: This closes the vent for the wing tank and the drain hole.
____
 S 016-007
 (6)  
Go into the surge tank through the access panel, No. 13.

 S 486-008

 (7)  
Close the vent duct for the center tank and the drain for the surge tank.

 (a)  
Install the structural vent plug, F80080-100, in the forward vent duct for the center tank.

 (b)  
Install the plug assembly for the drain tube, F80080-55, on the opening that goes to the drain line for the surge tank.

 (c)  
Install the cover assembly for the structural vent, F80080-56, in the rectangular opening in the forward vent duct for the center tank.

 S 486-009
 (8)  
Install the pressure door assembly, F80080-82, for the surge tank in the opening for the access panel, No. 13.

 S 486-010

 (9)  
Install the plug, F80080-88, to close the vent scoop in the opening for the access panel, No. 14, for the surge tank.

 S 016-011

 (10)
 Go into the main tank through the opening for the access panel, No. 12, to get access to the vent float valve.

 S 486-012

 (11)
 Install the stop assembly, F80080-26, for the vent float valve to put blockage in the float valve.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 02 Page 603 ú Jul 15/91
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A
737-300/400/500MAINTENANCE MANUAL
 F. Prepare the Center Tank Vent System for the Pressure Check (Fig. 601)
　
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