7  3  1  5  9 
10  6  2  4  8 

LOWER WING SKIN
NOTE:  TORQUE THE MOUNT BOLTS IN THE SEQUENCE SHOWN BY THE NUMBERS. THIS WILL MAKE SURE FUEL DOES NOT LEAK AROUND THE ACCESS PANEL.
Access Panel Mount Bolt Torque Pattern Figure 402
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737-300/400/500MAINTENANCE MANUAL
 (3)  AMM 28-11-00/801, Integral Fuel Tanks
 C. Access
 (1)  
Location Zone
 221 Center Section Fuel Tank

 (2)  
Access Panels
 3303 A/C Access Panel
 3403 A/C Access Panel

 D. Procedure
 S 014-002
 (1)  Remove the air conditioning equipment that you must remove to get access to the access panel for the center tank (Ref Chapter 21).
 S 654-003
 WARNING: CAREFULLY DO ALL OF THE SAFETY PROCEDURES TO DEFUEL THE TANK
_______ AND TO GO INTO THE TANK. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR IF YOU DO NOT OBEY THE SAFETY PROCEDURES.
 (2)  
Prepare to go into the center fuel tank (AMM 28-10-00/201).

 S 154-004

 (3)  
With the sealant removal tools, remove the layers of the sealant material from these surfaces (AMM 28-11-00/801):

 (a)  
The heads of the bolts that attach the panel

 (b)  
The edges of the clamp ring.

 S 034-005
 (4)  Remove the mounting bolts, the washers, and the clamp ring from the access panel.
 S 024-006
 CAUTION: DO NOT PUSH THE PANEL FROM THE OPENING WITH A SHARP OBJECT.
_______ DAMAGE CAN EASILY OCCUR TO THE IMPORTANT SURFACES WHICH MUST SEAL TIGHTLY.
 (5)  Remove the panel.
 (a)  
Push the panel up to break the seal.

 (b)  
If the panel does not move freely, hit it lightly around the edges with the rubber mallet until it moves freely.

 (c)  
Turn the panel and move it through the opening.

 (d)  
Disconnect the bonding jumper from the panel.

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737-300/400/500MAINTENANCE MANUAL
 S 494-007
 CAUTION: PUT SOME PROTECTION ON THE SEAL SURFACE EDGE OF THE ACCESS
_______ OPENING BEFORE YOU GO THROUGH THE OPENING. TOOLS AND EQUIPMENT CAN CAUSE DAMAGE TO AN IMPORTANT SEAL SURFACE IF THE EDGE DOES NOT HAVE PROTECTION.
 (6)  Install the rubber covers to give protection around the access panel opening.
 TASK 28-11-31-404-008
 3.  Center Tank Access Panel Installation (Fig. 401)_____________________________________
 A. Equipment
 (1) T477W - Bonding Meter, Avtron Manufacturing Co., Cleveland, OH
 B. Consumable Materials
 (1)  
B00148 - solvent, Methyl Ethyl Ketone (MEK) TT-M-261

 (2)  
A00702 - sealant, BMS 5-26, Type II, Class B

 C. References
 (1)  
SWPM 20-20-00, Standard Wiring Practices Manual

 (2)  
AMM 21-00-00, Air Conditioning

 (3)  
AMM 28-11-00/801, Integral Fuel Tanks

 D. Access
 (1)  
Location Zone
 212 Center Section Fuel Tank

 (2)  
Access Panels
 3303 A/C Access Panel
 3403 A/C Access Panel

 E. Procedure
 S 094-009
 (1)  Remove the rubber cover that gives protection to the access panel opening.
 S 114-010
 WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
　
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