(a)
Position a strong light source in the aft cargo compartment equipment bay.
WARNING: BLUE WATER CONTAMINATION CAN CAUSE SERIOUS DAMAGE TO ELECTRICAL OR ELECTRONIC EQUIPMENT. THIS CAN RESULT IN AN UNWANTED EFFECT ON THE FLIGHT SAFETY OF THE AIRPLANE.
(b)
Look for signs of blue water in the area below the toilet tank.
(c)
Examine the toilet tank drain tube, the drain valve control cable, and ground flush hose for signs of blue water.
(d)
Examine the toilet drain floor adapter and the adjacent area for signs of blue water.
(e)
You must do full inspections of all electrical cable looms for signs of blue water.
(f)
You must do an inspection of all tubes and hoses for signs of blue water.
(g)
If you find blue water has flowed into the aft cargo compartment equipment bay, put a warning placard in the flight compartment to tell all personnel, “DO NOT OPERATE ELECTRONIC EQUIPMENT”, before you continue.
(8)
If you have found signs of blue water, you must do the cleaning procedure for the toilet over-servicing task.
(9)
If you have not found signs of blue water, continue with this task.
(10)
Remove the tag and close the applicable lavatory flush motor circuit breaker.
(11)
Do the servicing procedure for the aft toilet system (AMM 12-17-00/201).
(12)
Install the access panel in the rear bulkhead of the aft cargo compartment.
(13)
Close the aft cargo compartment door (AMM 52-48-41/001).
(14)
Remove all tools and equipment from the work area.
5. Toilet Over-Servicing Conditional Cleaning (AftToilet)
A. General
(1)
If blue water contamination is found in the airplane, after an over-servicing event has occurred, an immediate cleanup action is necessary to prevent possible contamination of electrical or electronic components.
(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. All contaminated areas are to be completely cleaned.
(3)
It is most important that all moisture is removed from the contaminated area. Clean cloths and dry air are to be used.
(4)
In all areas where blue water contamination has to be removed and cleaned, you must use an approved disinfectant to kill all harmful micro-organisms.
(5)
The flight safety of the airplane, together with the safety of health and the prevention of bad smells, must be your first consideration when you complete this task.
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5-51-12 Page 208 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/99
B. References
(1)
AMM 12-17-00/201, Toilet Servicing
(2)
AMM 20-30-31/201, Cleaners and Polishes
(3)
AMM 20-30-51/201, Miscellaneous Materials
(4)
AMM 38-32-00/501, Toilet System
(5)
AMM 38-32-31/401, Toilet Drain Valve
(6)
AMM 38-32-51/401, Toilet Waste Tank
(7)
AMM 51-31-0/201, Seals and Sealing
C. 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
D. Access
(1)
Location Zones
109 Aft Lavatory or Galley (E)
113 Aft Lavatory (B)
114 Aft Lavatory or Galley (C)
118 Aft Lavatory or Galley (D)
218 Aft Cargo Compartment
219 Aft Cargo Compartment Door
220 Aft Cargo Compartment Equipment Bay
(2)
Access Panels
1502 Aft Toilet Service Panel
4504 Aft Cargo Compartment Door
E. Procedure
(1)
Put on protective clothing before you begin to clean up the blue water.
(2)
Use a clean absorbent cloth or a sponge to remove the blue water from the contamination area.
NOTE: If a large quantity of liquid is to be removed, a suction pump should be used to drain the contaminated area.
(3)
Use approved cleaning agents and disinfectants when you clean areas where blue water contamination has occurred (AMM 20-30-31/201).
(4)
If blue water is found in the aft lavatory area, do the steps that follow:
(a) Remove laying blue water from all surfaces.
NOTE: Most of the blue water should drain out of the airplane through the floor drains and the waste water system.
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