(4)  
Clean the strainer element (AMM 25-31-13/701).

 S 024-004
 S 164-005
 TASK 25-31-13-404-006
 3. Galley Drain Line Strainer Installation (Fig. 401)
_______________________________________
 A. References
 (1)  IPC 25-31-13
 B. Access
 (1)  Location Zone
 200 Upper Half Fuselage

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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 
WING SCREW  O-RING  (EXAMPLE) 
BOLT 

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

Galley Drain Line Strainer
Figure 401

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A
747-400 MAINTENANCE MANUAL
 C. Procedure
 S 424-014
 (1)  Install the rubber O-ring on the strainer housing.
 NOTE: Make sure the rubber O-ring and the mating surfaces are
____ clean for satisfactory seal after installation. Replace a damaged or worn O-ring.
 S 424-008
 (2)  
Install the strainer element into the strainer housing.

 S 424-015

 (3)  
Install the wing bolts and washers.

 NOTE: The wing bolts are a different dimension to
____ prevent an incorrect installation of the strainer element.
 S 024-017
 (4)  Remove all liquid from the sink and drain as much as possible. Place all waste material in a plastic bag for disposal.
 NOTE: Absorb all liquid with absorbant towels.
____
 S 794-010
 (5)  
Do a check of the sink drain line for leaks.

 (a)  
Open the cold water faucet above the galley sink.

 (b)  
Let the water flow through the sink drain line and the strainer assembly.

 (c)  
Do a check of the strainer assembly for leaks.

 (6)  
Install the necessary galley equipment.

 S 414-011
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A
747-400 MAINTENANCE MANUAL
 GALLEY DRAIN LINE STRAINER - CLEANING/PAINTING
______________________________________________
 1.  General_______
 A.  This task gives the instructions to clean the element in the strainer of the galley drain line.
 B.  A drain line strainer is installed in the galleys with a sink. The drain line strainer contains an element that you can remove and clean. The strainer housing assembly is installed in the galley drain line between the galley sink and the floor drain fitting.
 TASK 25-31-13-107-001
 2.  Galley Drain Line Strainer Element Cleaning (Fig. 701)___________________________________________
 A.  Consumable Materials
 (1)  
Soap Solution (Noncorrosive)

 (2)  
Plastic Bag

 (3)  
Absorbant Towles

 B.  References
 (1)  
　
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