S 424-024

 (7)  
Tighten the valve body to 200 pound-inches.

 S 414-023

 (8)  
For the drain valve in the main tank, install the main tank access door 541AB or 641AB (AMM 28-11-01/401).

 S 414-022

 (9)  
For the drain valve in the surge tank,
 install the surge tank access door 543AB or 643AB
 (AMM 28-11-03/401).

 S 414-021

 (10)
 For the drain valve in the center tank,
 connect the drain line to the drain valve.

 S 414-020

 (11)
 For the drain valve in the center tank, close the ECS equipment bay access door 194CR or 194CL (AMM 06-41-00/201).

 S 634-019

 (12)
 Refuel the fuel tank (AMM 12-11-01/301).

 S 214-018

 (13)
 Make sure there is no fuel leakage.

 S 604-017

 (14)
 Drain a small quantity of fuel from the applicable fuel tank to do a check on the drain valve (AMM 12-11-03/301).

 (a)  
If the drain valve does not operate correctly, replace the drain valve.

 TASK 28-11-05-004-009
 4.  Remove the Sump Drain Valve (Fig. 401)___________________________
 A. Equipment
 (1)  
Adapter, Sump Drain Valve R/I - B28001-1
 Adapter, Main and Surge Tanks - B28001-2
 Adapter, Center Tank - B28001-5

 B.
References

 (1)  
AMM 06-41-00/201, Fuselage (Major Zones 100 and 200) Access Doors and Panels

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 28-11-05
 ALL  ú ú 01 Page 405 ú May 28/99

A

757
MAINTENANCE MANUAL

 C. Access
 (1)  
Location Zones 194 Wing to Body - Forward Lower Half (Right) 541 Main Tank - Rib No. 5 to No. 17 (Left) 543 Surge Tank - Rib No. 21 to No. 23 (Left) 641 Main Tank - Rib No. 5 to No. 17 (Right) 643 Surge Tank - Rib No. 21 to No. 23 (Right)

 (2)  
Access Panels 194CL ECS Equipment Bay Access Door (Left) 194CR ECS Equipment Bay Access Door (Right)

 D.
Procedure

 S 014-004
 (1)  
For the drain valve in the center tank, open the ECS equipment bay access door 194CR or 194CL (AMM 06-41-00/201).

 S 034-013

 (2)  
To remove the drain valve from the center tank,
 disconnect the drain line from the drain valve.

 S 024-014

 (3)  
Use the adapter and remove the valve body from the tank sump fitting.
　
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