S 865-103
 S 425-110
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A
737-300/400/500MAINTENANCE MANUAL
 S 865-104
 (4)  
Fill the toilet tank with water.

 S 865-105

 (5)  
On flush/fill ports with caps, do not close the cap.

 S 015-106

 (6)  
If the anti-siphon assembly includes a vacuum break, pinch the vent line from the vacuum break.

 S 785-107

 (7)  
Do this task: Cabin Pressurization Test (AMM 38-32-00/501) or the Vacuum Fixture Test (AMM 38-32-00/501) to check for leakage from the flush/fill port.

 S 215-109

 (8)  
Examine the flush/fill port for leakage.

 (a)  If there is leakage, repair or replace the check valve in the anti-siphon assembly at the toilet tank.
 E. Return the Airplane Back to Its Usual Condition
 S 615-108
 (1)  Service the toilet but ignore the steps that flush the tank with 8 gallons of water (AMM 12-17-00/301).
 NOTE: This gives the steps to drain the toilet tank, add the
____ chemical precharge and close the service panel.
 TASK 38-32-00-785-122
 6. Toilet Tank Components and Piping Leak Test
___________________________________________
 A. General
 (1)  This test uses gravity to check the drain piping and toilet tank components for leaks. Do this test when the toilet tank, tank components, or the waste piping have been disturbed.
 B. References
 (1)  AMM 12-17-00/301, Toilet Servicing
 C. Access
 (1)  
Location Zones
 103 Forward Lavatory
 113 Left Aft Lavatory
 114 Right Aft Lavatory (if installed)
 118 Lavatory (if installed)
 205 Electronic Compartment
 218 Aft Cargo Compartment

 (2)  
Access Panels
 1104 Forward Toilet Service Panel
 1502 Aft Toilet Service Panel

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737-300/400/500MAINTENANCE MANUAL
 D. Procedure
 S 615-111
 (1)  
Do the servicing procedure for the toilet tank but drain the chemical precharge after five minutes (AMM 12-17-00/301).

 S 415-112

 (2)  
Close the service panel drain valve.

 S 865-113

 (3)  
Fill the toilet tank until the water is approximately half way up the toilet bowl.

 S 015-114

 (4)  
Remove the toilet tank shroud.

 S 015-115

 (5)  
Open the toilet tank dump valve.

 S 215-018

 (6)  
Examine the drain line connections under the toilet tank and at the service panel for leaks.

 (a)  If there are leaks at the connection under the tank, do these steps: 1) Tighten the clamp if it is loose. 2) Replace the drain tube or drain tube adapter if it is
 damaged.
 S 215-123
 (7)  Examine the tank top, the toilet bowl, the inlet, and the outlet fittings on top of the assembly for leakage.
 (a)  Tighten any clamps that are loose and if it is necessary, replace the hoses, seals, gaskets or fittings that have leaks.
 E. Return the Airplane Back to Its Usual Condition
 S 415-117
 (1)  
Install the toilet tank shroud.

 S 615-116

 (2)  
Service the toilet but ignore the steps that flush the tank with 8 gallons of water (AMM 12-17-00/301).

 NOTE: This gives the steps to drain the toilet tank, add the
____ chemical precharge and close the service panel.
 TASK 38-32-00-785-178
 7. Cabin Pressurization Test
_________________________
 A. General
 (1)  The cabin pressurization procedure is optional to the vacuum fixture procedure.
　
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