(c)
Remove the toilet tank drain valve from the top of the toilet tank (AMM 38-32-31).
(d)
Examine the tank drain valve and the valve seat in the tank for damage. 1) If you see damage to the valve seat, clean and repair the tank as necessary. 2) If the protective rubber boot is damaged, replace the drain valve
(AMM 38-32-31). 3) If the tank drain valve is unserviceable, repair or replace as necessary.
(e)
Install the toilet tank drain valve (AMM 38-32-31).
(f)
Fill the aft toilet system with water until the lavatory bowl is half full of water.
(g)
At the aft toilet service panel, examine the inside of the toilet drain tube to ensure no water flows from the toilet tank.
(20)
On the aft toilet service panel, as applicable, perform the following steps: a) Install the drain plug on the service panels without levers for the flapper valve. b) Set the CLOSED lever so the flapper valve is closed on service panels with
OPEN/CLOSE levers.
(21)
Close the drain cap, on the aft toilet service panel.
(22)
Pull and lock the tank drain valve handle on the aft toilet service panel (for example R.H. AFT TOILET).
(23)
In the aft cargo compartment equipment bay, perform a full visual inspection of the following components:
(a)
The 4-inch toilet tank drain tube at these connections: 1) The connection under the toilet tank(s). 2) The connection at the waste drain valve. 3) The connection at the aft toilet service panel. 4) For installations with more than one lavatory visually inspect at the junction
ducting.
(b)
The ground flush hose(s) at these connections:
1) The aft toilet service panel.
(c)
The toilet tank drain valve control cable(s).
(24)
If you find a leak on the aft toilet drain tube(s), perform the following steps:
(a)
If the leak is from the coupling, replace packing(s) as necessary and tighten the coupling to stop the leak.
(b)
If the leak is from a damaged drain tube, replace the drain tube.
(c)
If the leak is from an unserviceable drain valve, replace the valve (AMM 38-32-31).
(25)
If you find a leak on the aft toilet ground flush hose(s), tighten the couplings or replace the ground flush line (AMM 38-32-21).
(26)
If you find a damaged drain valve control cable, perform the following steps:
(a)
If the drain valve control cable is unserviceable, replace the control cable (AMM 38-32-41).
(b)
If you find the control cable is installed incorrectly, perform the installation and adjustment procedure (AMM 38-32-11).
(27)
At the aft toilet service panel, perform a full visual inspection of the drain valve assembly.
(a) If you find a leak on the drain valve assembly, perform the appropriate maintenance procedure (AMM 38-32-31).
(28)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the load control center panel, P18:
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(a) Applicable lavatory flush motor circuit breaker.
G. Return the airplane to its usual condition
(1)
Perform the aft toilet servicing procedure (AMM 12-17-0).
(2)
Remove all tools and equipment from the work area.
(3)
Close the aft toilet service panel.
(4)
Replace the access panels at the rear bulkhead of the aft cargo compartment.
(5)
Close the aft cargo compartment door (AMM 52-31-0).
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TOILET SYSTEM - CLEANING/PAINTING
1. General
A. This procedure has the steps to clean the toilet service panel and the steps to clean the toilet tank and the areas adjacent to the toilet tank.
2. Toilet Service Panel Cleaning
A. Standard Tools and Equipment
(1)
Manual alkaline emulsion cleaner (AMM 12-40-0)
(2)
Soft-bristle brush or sponge
B. References
(1) AMM 12-40-0, Cleaning and Washing
C. Access Panels
1104 Forward Toilet Panel
1502 Toilet Service Door
D. Clean the Panel
(1)
Regularly clean the toilet service panel with water and a cleaner.
(2)
If it is necessary, use a soft bristle brush or a sponge to remove the contamination.
(3)
Dry the toilet service panel with a clean cloth.
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