S 862-081
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A 737-300/400/500MAINTENANCE MANUAL
 (4)  S 012-082Open the aft cargo-compartment door for access (AMM 52-31-00/001).
 (5)  S 012-083Remove the access panel from the rear bulkhead in the aft cargo compartment.
 (6)  S 012-084Remove the toilet-tank shroud(s), as given in the removal procedure for the toilet waste tank (AMM 38-32-51/401).
 (7)  S 212-085In the aft lavatory, do the steps that follow: (a) Look for signs of blue water on the lavatory floor. (b) Look for signs of the blue fluid on the areas which surround the toilet tank. (c) AIRPLANES WITH NON MODULAR LAVATORIES INSTALLED; Examine the toilet-tank catch basin for signs of blue water.
 (8)  S 212-086In the aft cargo-compartment equipment-bay, do the steps that follow: (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) (c) (d) (e) (f)  Look for signs of blue water in the area below the toilet tank.Examine the toilet-tank drain tube, the drain-valve control cable and ground flush hose for signs of blue water.Examine the toilet-drain floor adaptor and the adjacent area for signs of blue water.If applicable, examine the catch-basin drain tubing for signs of blue water.If applicable, examine the auxiliary waste tank and related components and tubing for signs of blue water.

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A
737-300/400/500MAINTENANCE MANUAL
 (g)  
You must do full inspections of all electrical cable looms for signs of blue water.

 (h)  
You must do an inspection of all tubes and hoses for signs of blue water.

 S 212-087
 (9)  
If you have found signs of blue water, you must do the cleaning procedure for the aft-toilet over-servicing task (AMM 05-51-12/201).

 S 212-088

 (10)
 If you have not found signs of blue water, continue with this task.

 S 862-089

 (11)
 Remove the tag and close the applicable lavatory flush motor circuit breaker.

 S 612-090

 (12)
 Do the servicing procedure for the the aft toilet system (AMM 12-17-00/301).

 S 412-091

 (13)
 Install the access panel in the rear bulkhead of the aft cargo compartment.

 S 412-092

 (14)
 Close the aft cargo-compartment door (AMM 52-48-41/501).

 S 942-093

 (15)
 Remove all tools and equipment from the work area.

 TASK 05-51-12-102-094
 5.  Toilet Over-Servicing Conditional-Cleaning (Aft Toilet)_______________________________________________________
 A. General
 (1)  
If blue water contamination is found in the airplane, after an over-servicing event has occurred. An immediate clean-up 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.

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737-300/400/500MAINTENANCE MANUAL
　
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