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 NOTE:____ Let the handle move suddenly to the closed position to make sure that the drain valve in the toilet tank gives a good seal (closed).
 (c) (d) (e) (f) (g)  Disconnect the toilet-drain connector hose.Do a full visual examination of the drain valve assembly. (TOILET DRAIN)If you find wear or damage to a component, do the maintenance procedure and replace as necessary (AMM 38-32-81/201 and AMM 38-32-81/401).Do not close the drain valve assembly at the aft toilet service-panel.At the aft toilet service-panel, do the applicable check that follows:
 1) 2)  Make sure the drain plug is removed, on the service panels without levers for a flapper valve.Make sure the OPEN lever is set so the flapper valve is open, on service panels with OPEN/CLOSE levers.

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 3)  Make sure the PUSH-TO-OPEN lever is set so the flapper valve is open, on service panels with PUSH-TO -OPEN levers.
 S 616-071
 WARNING:_______DO NOT OVERFILL THE SYSTEM WITH WATER. CONTAMINATION OF ELECTRICAL EQUIPMENT WITH WATER CAN CAUSE SERIOUS DAMAGE AND HAVE AN UNWANTED EFFECT ON THE FLIGHT SAFETY OF THE AIRPLANE.
 (7)  
Fill the aft toilet system with water until the lavatory bowl is half full with water.

 S 016-046

 (8)  
In the aft lavatory, remove the toilet shroud assembly, as given when you do the removal procedure for the lavatory waste tank. (AMM 38-32-51/401).

 S 216-047

 (9)  
In the aft lavatory, do a full visual inspection of the components that follow:

 (a)  
Toilet tank

 (b)  
Toilet-tank catch basin

 (c)  
Drain adapter (floor)

 (d)  
Drain valve and gasket seal

 (e)  
Toilet flush motor-pump-filter assembly and gasket seal

 (f)  
Ground flush-hose connection

 

 S 966-048
 (10)
 If you find the toilet tank is cracked and has a leak, replace the toilet tank (AMM 38-32-51/401).

 S 166-049

 (11)
 For airplanes with non modular lavatories installed: If you find unwanted material or a blockage of the drain in the catch basin, remove as necessary.

 S 966-050

 (12)
 If you find the floor drain adapter is cracked or damaged, replace with a new adapter.

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 S 966-052
 (13)
 If you find a leak in the drain valve gasket, on the top of the toilet tank, replace the gasket. (AMM 38-32-31/401).

 S 966-053

 (14)
 If you find a leak in the gasket of the toilet-flush motor-pump-filter assembly, replace the gasket. (AMM 38-32-21/401).

 S 966-054

 (15)
 If you find a leak in a ground flush-hose connector, tighten the connector or replace the tubing (AMM 38-32-42/401).

 S 016-055

 (16)
 Disconnect the service-cart toilet-drain connection from the aft toilet service-panel.

 S 016-056

 (17)
 Do not close the drain valve assembly at the aft toilet service-panel (TOILET DRAIN).

 S 216-058

 (18)
 If you see water in the toilet drain tube (the toilet tank(s) drain valve and/or the auxiliary-toilet-tank drain valve is not fully closed), do the steps that follow:

 (a)  
Before you continue, make sure the water is not from the waste-water drain on the lavatory floor which connects to the toilet drain tube.

 (b)  
Connect the toilet drain tube from the service cart to the aft toilet service-panel (TOILET DRAIN).

 (c)  
Pull the tank drain-valve handle on the aft toilet
 service-panel to drain the tank.
 (for example: R.H. AFT TOILET).

 (d)  
Remove the toilet tank drain-valve from the top of the toilet tank (AMM 38-32-31/401).
　
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