500 
38-32-0  Feb 20/84 
Page 102 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

TROUBLE  PROBABLE CAUSE  ISOLATION PROCEDURE  REMEDY 
Toilet does not flush Toilet does not flush or flushes occasionally Toilet drain system leaking Ground flush connection leaking  Defective timer Defective motor-filter-pump assembly Foreign substance between drain valve and valve seat, plug and plug seat (if installed) and/or drain tube cap and seal Drain valve and/or seat defective Drain valve cable damaged or improperly rigged Drain tube plug and/or plug seat defective (if installed) Drain tube cap and/or seal defective Check valve defective  Check for continuity through timer with flush handle depressed. If continuity is not present, the timer is defective If the timer and wiring are not defective, the flush motor-pump-filter is defective Visually check valve and seat for defects Visually check cable for defects and proper rigging Visually check plug and seat for defects Visually check drain tube cap and seal for defects Disconnect flush line at toilet tank. Using non-metallic instrument, depress and release check valve several times. Verify valve closes completely with no tendency to stick of bind. Check for deformation, cracks, chips and/or buildup of chemical solids  Replace timer (Ref 38-32-11) Replace defective motor-pump-filter assembly (Ref 38-32-21) Connect toilet service cart and flush system with minimum of 6 gallons of water (Ref 12-17-0) Replace defective component (Ref 38-32-31) Replace damaged cable and/or rerig as required (Ref 38-32-41) Replace damaged plug and plug seat Replace damaged cap and/or seal as required Replace any valve which does not seat properly or provide correct directional control (Ref 38-32-31) 

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Feb 20/84  38-32-0 
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

TOILET SYSTEM - MAINTENANCE PRACTICES
1.  General
A.  This procedure supplies instructions to perform the following tasks:
(1)  
Toilet waste blockage removal (forward lavatory).

(2)  
Toilet waste blockage removal (aft lavatory).

B.  This section supplies the procedure to perform when a blockage of the toilet waste drain has occurred.
C.  When a blockage to the waste system of a toilet occurs, it is possible that toilet flush/waste liquid can spill inside the airplane. If this situation should occur, all signs of contamination must be removed immediately and the areas of contamination fully cleaned and disinfected  (AMM 05-51-12).
D.  In extreme cold conditions, the toilet fluid can freeze. If a blockage to the toilet system should occur, extreme cold weather could be the cause.
E.  A blockage of the toilet system can occur in the following areas:
(1)  
Forward lavatory

(2) 
 E/E compartment

(3)  
Aft lavatory(s)

(4)  
Aft cargo compartment equipment bay

2.  Toilet Waste Blockage Removal (Forward Lavatory)
A.  General
(1)  
This inspection procedure is to be accomplished when a blockage occurs to the waste drain of the forward toilet system.

(2)  
This inspection procedure is for the forward toilet system.

B.  References
(1)  
AMM 12-17-0, Toilet Servicing

(2)  
AMM 12-40-0, Cleaning and Washing

(3)  
AMM 20-30-51, Miscellaneous Materials

(4)  
AMM 38-32-0, Toilet System

(5)  
AMM 38-32-0, Toilet System - Cleaning/Painting

(6)  
AMM 38-32-21, Toilet Flush Motor Assembly

(7)  
AMM 38-32-22, Toilet Filter

(8)  
AMM 38-32-31, Toilet Drain Valve(s)

(9)  
AMM 38-32-41, Toilet Drain Valve Control Cable

(10)
AMM 38-32-51, Toilet Waste Tank

(11)
AMM 51-31-0, Seals and Sealing

(12)
AMM 52-48-41, E/E Compartment Door

C.  Equipment
(1)  Maintenance Stand
500 
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D.  Consumable Materials
(1)  
Brush, drain, extendable (4-inch) – Commercially available

(2)  
Brush, soft-bristle – Commercially available

(3)  
G01043 Cloth, lint-free

(4) 
 G00027 Cheesecloth

(5)  
B00051 Disinfectant – Deodorizer Lysol

(6)  
G00000 Gloves – Disposable

(7)  
G00000 Shop Coat – Disposable

(8)  
G00000 Mask, face – Disposable
　
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