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 B.  This procedure contains two tasks. The first task removes the drain check valve of the fueling manifold. The second task installs the drain check walve of the fueling manifold.
 TASK 28-21-05-004-001
 2.  Remove the Drain Check Valve of the Fueling Manifold (Fig. 401)
____________________________________________________
 A.  References
 (1)  
AMM 06-41-00/201, Fuselage (Major Zones 100 and 200) Access Doors and Panels

 (2)
AMM 28-11-00/201, Fuel Tanks

 (3)
AMM 28-11-02/401, Center Tank Access Door

 (4)
AMM 28-26-00/201, Defueling

 B.  
Access

 (1)  
Location Zone
 134 Wing Center Section (Right)

 (2)  
Access Panels
 134AZ Center Tank Access Door (Right)
 134BZ Baffle Door (Right)
 134CZ Baffle Door (Right)
 134DZ Baffle Door (Right)

 C.  
Procedure

 (1)
Defuel the center fuel tank (AMM 28-26-00/201).

 (2)
Remove the center tank access door, 134AZ (AMM 28-11-02/401).

 S 654-002
 S 014-003
 S 944-004
 WARNING: OBEY THE FUEL TANK ENTRY PRECAUTIONS (AMM 28-11-00/201).
_______ FAILURE TO OBEY THE FUEL TANK ENTRY PRECAUTIONS COULD CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)
Obey the fuel tank entry precautions (AMM 28-11-00/201).

 (4)
Go into the center fuel tank.

 S 014-005
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 28-21-05
 ALL  ú ú 01 Page 401 ú May 28/99

A

757
MAINTENANCE MANUAL

FWD BOSS
CENTER FUEL TANK 
SEE  A 
RIB (EXAMPLE)  TANK FUEL CENTER  LEFT DRAIN CHECK VALVE  RIGHT DRAIN CHECK VALVE 
SEE  C  SEE  B 
CENTER FUEL TANK 
A 
FUELING 
MANIFOLD 

NUT, PACKING 
DRAIN CHECK VALVE 
SEE  D 
TANK FUEL CENTER  RIB (EXAMPLE) RIGHT DRAIN CHECK VALVE B 
MANIFOLD FUELING 

FUELING
MANIFOLD

NUT,PACKING 
FWD 
DRAIN 
NUT, PACKING  DRAIN CHECK VALVE  CHECK 
SEE  D  DRAIN HOLE  VALVE 
LEFT DRAIN CHECK VALVE  DRAIN CHECK VALVE 
C D 

Fueling Manifold Drain Check Valve Installation
Figure 401

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