(2)  
IPC 25-31-13

 C.  Access
 (1)  Location Zone
 200 Upper Half Fuselage

 D.  Procedure
 S 027-010
 (1)  
Remove the wing bolts from the strainer assembly.

 S 027-002

 (2)  
Remove the strainer element from the strainer housing (AMM 25-31-13/401).

 (3)
Remove all of the unwanted materials from the strainer element.

 S 167-004

 (4)  
Clean the strainer element fully with a weak detergent and water that is warm.

 S 147-003
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A
747-400
MAINTENANCE MANUAL

WATER FILTER (REF) 
DRAIN 
DRAIN  LINES 
LINES 
SINK 
STRAINER 
SEE  A 
CLAMP 
ATTACHMENT SCREW 
AND WASHER 
(3 LOCATIONS) 
GALLEY 
DRAIN HOSE 
FLOOR 
DRAIN 
WASHER  FITTING 
GALLEY DRAIN LINE STRAINER INSTALLATION 
FOR THE GALLEY DRAIN LINE 
SCREW WING  O-RING  (EXAMPLE) 
BOLT 

STRAINER 
HOUSING 
STRAINER 
ELEMENT 
CLAMP (2) 
1-INCH 
DRAIN 
HOSE 
STRAINER 
A 

Galley Drain Line Strainer
Figure 701

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A 747-400 MAINTENANCE MANUAL
 (5)  S 167-005Clean the rubber O-ring and all the mating surfaces to make sure you get a satisfactory seal after installation. (a) Replace a damaged or worn O-ring seal.
 (6)  S 427-006Install the strainer element into the strainer housing (AMM 25-31-13/401).
 (7)  S 427-011Install the wing bolts on the strainer assembly.
 (8)  S 167-012Clean the surrounding area of the drain strainer. (a) Remove all liquid and debris that may have spilled below the drain strainer. (b) Place all waste material in a plastic bag for disposal. (c) Clean all liquid with an absorbant towel.

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A
747-400 MAINTENANCE MANUAL
 GALLEY VENTILATION INLET FILTER - MAINTENANCE PRACTICES
_______________________________________________________
 1.  General
_______
 A.  This procedure gives the instructions to clean the inlet filter for the galley ventilation system.
 B.  To clean the inlet filter you must remove, clean and install the filters. Clean the filters regularly to make sure that the galleys have sufficient ventilation.
 TASK 25-31-17-102-001
 2.  Galley Ventilation Inlet Filter Cleaning (Fig. 201)
________________________________________
 A.  Standard Tools and Equipment
 (1)  Bucket
 B.  Access
 (1)  Location Zone
 200 Upper Half Fuselage

 C.  Procedure
 S 112-009
 (1)  Prepare the solvent:
 (a)  Put the soap with the water in a bucket.
 NOTE: A sufficient quantity of soap with water must
____ be used to clean the filter.
 S 032-002
 (2)  
Remove the fasteners and washers which attach the grill to the inlet assembly.

 (3)  
Remove the filter from the grill.

 S 112-010

 (4)  
Clean the filter:

 S 022-008
　
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