757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 4(85)

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 1.  General_______
 A.  The defueling valve actuator is found on the dry side of the rear spar. The defueling valve actuator is installed inboard of each end rib in the center fuel tank. Access to the defueling valve actuator is through the shock strut door of the main landing gear.
 B.  It is not necessary to defuel the fuel tank to get access to the defueling valve actuator.
 C.  This procedure contains two tasks. The first task removes the defueling valve actuator. The second task installs the defueling valve actuator.
 D.  The procedure to remove and install the defueling valve is in
 AMM 28-26-01/401.

 TASK 28-26-02-004-009
 2.  Remove the Defueling Valve Actuator (Fig. 401)___________________________________
 A.  Access
 (1)  
Location Zones
 733 Left MLG Oleo Door
 743 Right MLG Oleo Door

 B.  
Procedure

 S 864-010
 (1)  
Open this circuit breaker on the right miscellaneous electrical equipment panel, P34, and attach a DO-NOT-CLOSE tag:

 (a)  
34A9, FLNG VALVES

 S 984-011
 (2)  
Move the manual override handle on the defueling valve actuator to the CLOSED position.

 (3)  
Remove the electrical connector from the defueling valve actuator.

 (4)
Remove the bonding jumper from the defueling valve actuator.

 (5)  
Remove the four actuator mounting screws.

 S 034-012
 S 034-013
 S 034-014
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 28-26-02
 ALL  ú ú 01 Page 401 ú May 28/99

A

757
MAINTENANCE MANUAL

ACTUATOR MOUNTING SCREW (4 LOCATIONS)  CONNECTOR ELECTRICAL 
PLATE ADAPTER 
SHAFT MATING  BONDING JUMPER ACTUATOR DEFUELING VALVE 
ACTUATOR VALVE DEFUELING SEE A  HANDLE OVERRIDE MANUAL 
INBD 
REAR SPAR  FWD 
SCREW (4 LOCATIONS) ACTUATOR MOUNTING  CONNECTOR ELECTRICAL  A 1 DEFUELING VALVE ACTUATOR 
PLATE ADAPTER 
ACTUATOR DEFUELING VALVE 
SHAFT MATING  BONDING JUMPER 
HANDLE OVERRIDE MANUAL 
REAR SPAR 
INBD 
FWD 
1 2  PREFERRED ALTERNATE  A 2 DEFUELING VALVE ACTUATOR 
Figure 401 Defueling Valve Actuator Installation 

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