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737-300/400/500MAINTENANCE MANUAL
 S 864-059
 (4) Release pressure from hydraulic system B (Ref 27-81-00/201).
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737-300/400/500MAINTENANCE MANUAL
 SYSTEM B OR STANDBY LE FLAP AND SLAT HYDRAULIC FUSE - REMOVAL/INSTALLATION
_____________________________________________________________________________
 1.  General
_______
 A.  There are four tasks in this procedure. There is one task for the removal and one task for the installation of the (system B or standby system) hydraulic fuse of the leading edge flap and slat. The third task is to reset the hydraulic fuse for system B. The fourth task is to reset the hydraulic fuse for the standby system.
 TASK 27-81-61-004-001
 2.  (System "B" or Standby System) Hydraulic Fuse Removal
_____________________________________________________
 A.  References
 (1)  
27-81-00/201, Leading Edge Flap and Slat Control System

 (2)  
29-15-00-24, IPC

 (3)  
29-22-00-01D/01E/01F, IPC

 B.  
Access

 (1)  
Location Zone
 216 Main Wheel Well, LH
 217 Main Wheel Well, RH

 C.  
Procedure

 S 864-002
 (1)  
Do this task: "Leading Edge Flaps and Slats Hydraulic Systems A, B and Standby Depressurization" (Ref 27-81-00/201).

 S 864-023

 (2)  
Get access to the leading edge standby hydraulic system components on the keel beam in the main landing gear wheel well.

 S 024-003

 (3)  
Remove the hydraulic fuse (Fig. 401):

 (a)  
Use a suitable container to catch hydraulic fluid when the fuse is removed.

 (b)  
Disconnect the inlet and outlet hydraulic lines.

 (c)  
Remove the hydraulic fuse.

 NOTE: If you are removing both the flow-limiting valve and
____ the hydraulic fuse, make a note of the locations before removing them.
 TASK 27-81-61-404-004
 3.  (System B and Standby System) Hydraulic Fuse Installation
_________________________________________________________
 A.  Consumable Materials
 (1)  
G00062 Fluid - Hydraulic, Fire Resistant, BMS 3-11

 (2)  
D00054 Lubricant - Assembly, Skydrol, MCS352

 B.  
References

 (1)  
12-12-00/301, Hydraulic Reservoir

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737-300/400/500
MAINTENANCE MANUAL

HYDRAULIC RESERVOIR (REF)  SEE  A 
VALVE (REF) FLOW-LIMITING LEADING EDGE FLAP 
LEADING EDGE FLAP AND SLAT HYDRAULIC FUSE 
FWD 
STANDBY SYSTEM  HYDRAULIC PUMP (REF) 

LEADING
RELIEF
EDGE FUSE
VALVE
(EXTEND)
LEADING EDGE FUSE (RETRACT)
FWD
B-NUT
SYSTEM B A
Leading Edge Flap and Slat Hydraulic Fuses Figure 401
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