(3)
Toilet over-servicing conditional inspection (aft toilet).
(4)
Toilet over-servicing conditional cleaning (aft toilet).
B. This section supplies the inspection and cleanup procedures, when too much toilet flushing liquid (blue water) has been used during the toilet servicing procedure (AMM 12-17-00/201).
C. When toilet flushing liquid spills inside the airplane, you must remove all signs of liquid, clean and fully dry the areas of contamination immediately.
NOTE: The surfaces where the toilet flushing liquid (blue water) dries, will show as a blue stain.
D. Blue water contamination is possible in the areas that follow:
(1)
Forward Lavatory
(2)
Electronic Equipment Compartment
(3)
Aft Lavatories
(4)
Aft Cargo Compartment Equipment Bay
2. Toilet Over-Servicing Conditional Inspection (Forward Toilet)
A. General
(1)
This inspection procedure is to be done when an over-service of the forward toilet system has occurred or you think it has occurred.
NOTE: The term “over-service” is used to show that too much blue water has been used during the servicing of the toilet system, and has spilled inside the airplane.
(2)
It is possible for blue water contamination to occur in a single isolated area or more than one area, dependent upon the amount of liquid spilled.
(3)
A full visual inspection is necessary to confirm the extent of possible blue water contamination.
NOTE: Spilled liquid can use different flowpaths to disperse.
(4)
It is recommended to do a check of the airplane records to see if there has been a spill of blue water before and if blue stains remain.
NOTE: Unnecessary work can be avoided if knowledge of another over-servicing is available for comparison.
B. References
(1)
AMM 12-17-00/201, Toilet Servicing
(2)
AMM 20-30-51/201, Miscellaneous Materials
(3)
AMM 38-32-00/501, Toilet System
(4)
AMM 38-32-51/401, Toilet Waste Tank
(5)
AMM 51-31-0/201, Seals and Sealing
(6)
AMM 52-48-41/001, Electronic Equipment Compartment Door
(7)
AMM 52-61-0/001, Forward Airstair
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May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 5-51-12 Page 201
C. Equipment
(1) Workstand
D. Consumable Materials
(1)
Gown – Disposable
(2)
Gloves – Disposable
(3)
Shop Coat – Disposable
(4)
Mask, face – Disposable
(5)
Glasses – Safety
(6)
Cloth, lint-free
(7)
Cheesecloth
E. Access
(1)
Location Zones
103 Forward Lavatory (A)
205 Electronic Equipment Compartment
206 Forward Airstair Compartment
207 Forward Airstair
(2)
Access Panels
1104 Forward Toilet Service Panel
1201 Electronic Equipment Compartment Door
1601 Forward Airstair Door
F. Procedure
(1)
Drain the forward toilet waste tank (AMM 12-17-00/201).
NOTE: Drain the system only, do not complete a full service of the toilet system.
(2)
Open and tag the applicable lavatory flush motor circuit breaker.
(3)
Open the electronic equipment compartment door for access (AMM 52-48-41/001).
(4)
Position the maintenance stand under the electronic equipment compartment and put a strong light source inside the compartment.
(5)
Extend the forward airstair for access (AMM 52-61-0/001).
(6)
Remove the toilet shroud assembly, as given in the removal procedure for the toilet waste tank (AMM 38-32-51/401).
(7)
In the forward lavatory, do an inspection as follows:
(a)
Look for signs of blue water on the lavatory floor.
(b)
Look for signs of the blue water on the areas which surround the toilet tank.
(8)
In the electronic equipment compartment, do a visual inspection as follows:
(a)
Look for signs of blue water in the area below the toilet tank.
(b)
Examine the toilet tank drain tube, the drain valve control cable, and ground flush hose for signs of blue water.
(c)
Examine the toilet drain floor adapter and the adjacent area for signs of blue water.
(d)
Examine the airstair drain pan and moisture shroud for signs of blue water.
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