E. Return the Airplane to its Usual Condition
(1)
Remove all tools and equipment from the work area.
(2)
Close the E/E compartment door (AMM 52-48-41).
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ELECTRONIC COMPARTMENT MOISTURE SHROUD AND DRIP PAN – INSPECTION/CHECK
1. General
A. This procedure supplies the instructions to perform the following tasks:
(1)
For airplanes with an airstair installation:
(a) Inspection of the moisture shroud and the forward airstair drip pan which protect the E1 rack in the electronic compartment.
(2)
Perform the inspection of the moisture shroud and/or drip pan in the electronic compartment when one of these unwanted liquid spills occur.
(a)
Overservicing of the forward toilet system.
(b)
Liquid spill in the forward lavatory area.
(c)
Liquid spill in the forward galley area.
(d)
Excessive quantity of snow/ice/rain on the forward airstair when retracted to the flight position.
(3)
The moisture shroud must be free of holes and be correctly installed.
NOTE: The surface of the shroud must have a good surface tension and have no areas where liquid could possibly collect.
(4)
All drain tubes must be free from blockages, and the drain pan should be clean and free of debris.
NOTE: For airplanes with airstair installation; during extreme cold weather, ice, snow and dirt can be brought aboard on the airstair and cause a blockage to the drain tube.
(5)
The forward toilet system must be correctly installed and there are no leaks in the toilet drain tube or the ground flush tube.
2. Electronic Compartment Moisture Shroud and Drip Pan Inspection
A. General
WARNING: MOISTURE CONTAMINATION OF ELECTRICAL OR ELECTRONIC EQUIPMENT CAN CAUSE SERIOUS DAMAGE TO ELECTRICAL SYSTEMS. THIS CAN RESULT IN AN UNWANTED EFFECT TO THE FLIGHT SAFETY OF THE AIRPLANE.
(1) This inspection procedure is to be accomplished when liquid has been spilled in the forward toilet or forward galley area.
B. References
(1)
AMM 05-51-12, Toilet Overservicing Condition
(2)
AMM 05-51-13, Galley Spill Condition
(3)
AMM 12-17-0, Toilet Servicing
(4)
AMM 20-30-51, Miscellaneous Materials
(5)
AMM 51-31-0, Seals and Sealing
(6)
AMM 52-48-41, E/E Compartment Door
(7)
AMM 52-61-0, Forward Airstair
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C. Equipment and Materials
(1)
Workstand
(2)
Adhesive, BAC 5010 Type 60
D. Consumable Materials
(1)
G00000 Gloves – Disposable
(2)
G01915 Glasses – Safety
E. Access
(1)
Location Zones
103 Forward Lavatory
104 Forward Galley
105 Forward Entry Door
106 Forward Galley Service Door
205 E/E Compartment
(2)
Access Panels
1201 E/E Compartment Door
F. Procedure
(1)
Extend the forward airstair (AMM 52-61-0).
(2)
Open the E/E compartment door for access (AMM 52-48-41).
(3)
Place the workstand in position at the E/E compartment.
(4)
Perform the inspection of the airstair drain pan and moisture shroud as follows:
(a)
Use a portable strong light source to fully view the airstair drain pan and moisture shroud installation.
(b)
Make sure the airstair drain pan does not contain liquid.
(c)
Loosen the clamp and remove drain tube from the airstair drain pan access panel.
(d)
Remove the airstair drain pan access panel.
(e)
Inspect the airstair drain pan for correct installation as follows: 1) Ensure there are no cracks in the fiberglass drain pan. 2) Perform a check to ensure the installation bolts are tight and have sealant
protection. 3) Make sure the disconnected drain tube is free from blockage. 4) If you find dirt or moisture in the drain pan, clean the drain pan and remove the
contamination. 5) If you find blue water has flowed into the electronics compartment, perform the toilet overservicing condition task (AMM 05-51-12).
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