(9)
G01915 Glasses – Safety
E. Access
(1)
Location Zones
103 Forward Lavatory (A)
205 E/E Compartment
(2)
Access Panels
1104 Forward Toilet Service Panel
1201 E/E Compartment Door
F. Procedure
(1)
If there is a bad localized smell in the airplane, fully ventilate the area in an effort to stop the spread of contamination.
(2)
Open the E/E compartment door for access (AMM 52-48-41).
(3)
Open the forward toilet service panel.
(4)
Position the maintenance stand under the E/E compartment and install a strong light source inside the compartment.
(5)
Open this circuit breaker on the load control center panel, P18, and attach a
DO-NOT-CLOSE tag:
(a) Applicable lavatory flush motor circuit breaker.
(6)
Connect the service cart to the forward toilet service panel and perform the procedure to drain the toilet system (AMM 12-17-0).
NOTE: Try to drain the system only. Do not complete a full service of the toilet system.
(a) On the forward toilet service panel, perform the following applicable step(s): 1) Ensure the drain plug is removed on the service panels without levers for the flapper valve. 2) Ensure the OPEN lever is set so that the flapper valve is open on service panels with OPEN/CLOSE levers.
3) Ensure that the toilet tank drain valve handle is extended and locked in the open position.
(7)
In the forward lavatory, open the separator in the lavatory bowl and check for toilet flush/waste liquid in the toilet tank.
(8)
If the toilet tank has not drained and appears to be blocked, accomplish these steps:
(a)
In the E/E compartment, make sure the toilet tank drain valve control cable is correctly installed (AMM 38-32-41).
(b)
At the forward toilet service panel, accomplish these steps: 1) Release and push in the toilet tank drain valve handle to close the toilet tank drain valve. 2) Pull and push on the toilet tank drain valve handle several times quickly to open
NOTE: The cable tension should show the toilet tank drain valve is in the open position.
500
38-32-0 Page 202 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/99
and close the toilet tank drain valve. 3) Pull on the toilet tank drain valve handle and lock in the open position.
CAUTION: DO NOT TRY TO CLEAR TOILET TANK BLOCKAGES BY THE USE OF UNAUTHORIZED SHARP OR POINTED TOOLS. DAMAGE CAN BE CAUSED TO THE PROTECTIVE RUBBER BOOT ON THE DRAIN VALVE AND PREVENT THE CORRECT OPERATION OF THE VALVE.
(c)
In the forward lavatory, open the separator in the lavatory bowl and very carefully use a long handle brush to clear possible blockages at the drain outlet of the tank.
NOTE: The brush must have a round head and soft bristles to prevent possible damage to the rubber boot on the drain valve.
(d)
If the blockage in the toilet drain tube has not cleared, continue with this procedure.
(9)
In the forward toilet, remove the toilet tank shroud assembly using the procedure to remove the toilet waste tank (AMM 38-32-51).
(10)
Use polyethylene sheeting in the forward lavatory area to prevent the possibility of contamination if toilet waste is spilled.
(11)
Remove the toilet drain valve (AMM 38-32-31).
(12)
Remove the blockage as follows:
(a)
Insert the flexible, extendable drain brush through the tank drain valve access hole.
(b)
Slowly and carefully push the drain brush into the 4-inch toilet tank drain tube.
(c)
Slowly and with the minimum force necessary, move the drain brush down the drain tube until the blockage is clear.
(d)
Flush water into the toilet tank and make sure the blockage has been fully removed.
(e)
Stop the flush water and remove the flexible drain brush.
(f)
Use the long handle brush to clean the toilet tank drain valve seat inside the toilet tank.
(13)
If you cannot free the blockage in the toilet drain tube, you must make an assessment of where the blockage is to be found and replace the drain tube as applicable.
NOTE: If the removal of the toilet drain tube is necessary, ensure you take full precautions to prevent blue water contamination of local area. It is recommended to use suction methods to remove waste from the drain tube before removal.
(14)
Perform an inspection of the toilet drain valve (AMM 38-32-31).
(15)
Install the toilet drain valve (AMM 38-32-31).
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