(2)  
Access Panels
 7211L Left Wing Tank Access Panel (Left)
 7411R Right Wing Tank Access Panel (Right)

 D. Procedure
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 S 014-013
 WARNING:_______OBEY THE FUEL TANK ENTRY PRECAUTIONS. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR IF YOU DO NOT OBEY THE FUEL TANK ENTRY PRECAUTIONS.
 (1)  
Obey the fuel tank entry precautions (AMM 28-10-00/201).

 S 434-014

 (2)  
Install a new O-ring in the groove on the adapter.

 S 424-015

 (3)  
Put and hold the adapter in the opening in the upper wing skin.

 S 434-016

 (4)  
Install a new O-ring in the groove on the seal ring.

 S 434-017

 (5)  
Put a seal ring on the adapter.

 S 434-029

 (6)  
Do these steps from inside the fuel tank:

 NOTE: Two persons are necessary to do these steps.
____
 (a)  
Install the retaining nut with the spanner wrench.

 (b)  
Tighten the retaining nut to a torque of 30-40 foot-pounds.

 (c)  
Install lockwire between the lug on the retaining nut and the tab on the airplane structure.

 (d)  
Attach the lanyard on the filler cap to the lug on the retaining nut.

 S 424-021
 (7)  
Install the filler cap on the overwing fill port.

 S 094-022

 (8)  
Remove the maintenance mats.

 S 094-023

 (9)  
Remove the equipment used to purge and ventilate the fuel tank (AMM 28-10-00/201).

 S 414-024

 (10)
 Install the No. 9 wing fuel tank access panel (7211L or 7411R) (AMM 28-11-11/401).

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A
737-300/400/500MAINTENANCE MANUAL
 S 654-025
 (11)
 Refuel the fuel tank (AMM 12-11-00/301).

 S 214-026

 (12)
 Make sure there are no fuel leaks.

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A 737-300/400/500MAINTENANCE MANUAL

(WBL 557.0) SEE

BAFFLE CHECK VALVE

Baffle Check Valves
Figure 401

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F96812
A
737-300/400/500MAINTENANCE MANUAL
 FUEL TANK BAFFLE CHECK VALVE - REMOVAL/INSTALLATION
___________________________________________________
 1. General
_______
 A. This procedure has two tasks:
 (1)
A task to remove the baffle check valve for the fuel tank.

 (2)
A task to install the baffle check valve for the fuel tank.

 TASK 28-11-81-004-001
 2. Fuel Tank Baffle Check Valve Removal (Fig. 401)
____________________________________
 A. References
 (1)  
AMM 28-11-11/401, Wing Fuel Tank Access Panels

 (2)  
　
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