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
TASK 05-51-12-202-049
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 liquids can use different flowpaths to disperse.
____
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B.
C.
D.
E.
A
737-300/400/500MAINTENANCE MANUAL
(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.
References
(1)
AMM 12-17-00/301, 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 51-31-00/201, Seals and Sealing
(6)
AMM 52-48-41/001, Electronic-Equipment Compartment Door
(7)
AMM 52-61-10/401, Forward AirstairEquipment
(1)
WorkstandConsumable Materials
(1)
G00000 Gown - Disposable
(2)
G00000 Gloves - Disposable
(3)
G00000 Shop Coat - Disposable
(4)
G00000 Mask, face - Disposable
(5)
G01915 Glasses - Safety
(6)
G01043 Cloth, lint-free
(7)
G00027 CheeseclothAccess
(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
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A
737-300/400/500MAINTENANCE MANUAL
F. Procedure
S 682-050
(1) Drain the forward toilet waste-tank (AMM 12-17-00/301).
NOTE: Drain the system only, do not complete a full service of the
____
toilet system.
S 862-051
(2)
Open and tag the applicable lavatory flush motor circuit breaker.
S 012-052
(3)
Open the electronic-equipment compartment door for access
(AMM 52-48-41/501).
S 942-053
(4)
Position the maintenance stand under the electronic equipment compartment and put a strong light source inside the compartment.
S 412-054
(5)
Extend the forward airstair for access (AMM 52-61-00/501).
S 012-055
(6)
Remove the toilet shroud assembly, as given in the removal procedure for the toilet waste tank (AMM 38-32-51/401).
S 222-056
(7)
In the forward lavatory, do an inspection as follows:
(a)
Look for signs of blue water on the lavatory floor.
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