25-51-01
ALL ú ú 04 Page 601 ú Jul 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
WARNING: MOISTURE CONTAMINATION OF ELECTRICAL OR ELECTRONIC EQUIPMENT
_______ CAN CAUSE POSSIBLE 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 done when liquid has been spilled in the forward toilet or forward galley area.
B. References
(1)
AMM 05-51-12/201, Toilet Over-Servicing Condition
(2)
AMM 05-51-13/201, Galley Spill Condition
(3)
AMM 12-17-00/301, Toilet Servicing
(4)
AMM 20-30-51/201, Miscellaneous Materials
(5)
AMM 51-31-00/201, Seals and Sealing
(6)
AMM 52-48-41/001, Electronic Equipment Compartment Door
(7)
AMM 52-61-00/001, Forward Airstair
C. Equipment
(1) Workstand
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 Electronic Equipment Compartment
(2)
Access Panels
1201 Electronic-Equipment Compartment Door
F. Procedure
S 016-017
(1) Extend the forward airstair (AMM 52-61-00/001).
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25-51-01
ALL ú ú 04 Page 602 ú Jul 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 016-018
(2)
Open the electronic-equipment compartment door for access. (AMM 52-48-41/001).
S 946-019
(3)
Put the workstand in position at the electronic equipment compartment.
S 216-020
(4)
Do the inspection of the airstair drain pan and moisture shroud as follows:
(a)
Use a portable strong light source to fully see 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)
Examine the airstair drain pan for correct installation as follows: 1) Make sure there are no cracks in the fiber-glass drain pan. 2) Do a check to make sure 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 and 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, do the toilet over-servicing condition task (AMM 05-51-12/201).
(f) Examine the forward moisture shroud for correct installation as follows: 1) Use a portable, strong light source to fully see the
moisture shroud installation.
CAUTION: CARE MUST BE TAKEN WHEN YOU PUT THE LIGHT BEHIND THE
_______ SHROUD FOR THE EXAMINATION. THE MATERIAL CAN EASILY BE DAMAGED BY SHARP OBJECTS AND MAKE HOLES IN THE SHROUD.
2) Position the portable light source behind the shroud and look for holes and signs of wear in the material.
NOTE: Points where the shroud is held to the structure,
____ are primary areas where damage can occur.
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