(2)
G00000 Plastic Tool
(3)
B01010 Solvent - Final Cleaning of Solvent Resistant Organic Coatings prior to Non-structural Bonding (Series 90) .
(4)
A00246 Compound - Self Leveling, BMS 5-125, Type II or III (2 Component Kit - Base + Catalyst) (Optional: BMS5-95, Class B)
C. References
(1)
AMM 20-30-90/201, Solvent - Series 90
(2)
AMM 51-21-02/701, Interior and Exterior Finishes (Prepaint Cleaning and Pretreatment) - Cleaning/Painting
(3)
AMM 51-21-04/701, Alodized Surfaces - Cleaning/Painting
(4)
SOPM 20-30-90, Final Cleaning Solvent Resistant Organic Coating Before Non-structual Bonding
D. Procedure
S 338-010
(1)
With a hardwood or plastic tool, remove the damaged leveling compound.
S 338-011
(2)
Remove all the loose pieces of the leveling compound with a stiff-bristle brush.
S 118-009
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(3) Fully clean the structure and the remaining leveling compound with solvent, Series 90 (AMM 20-30-90/201 or SOPM 20-30-90).
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(4) S 378-005If the surface is not applied with the primer, or if the primer is removed, alodize the surface (AMM 51-21-04/701) and apply the BMS 10-11, Type I, primer (AMM 51-21-02/701).
NOTE:____ Do not apply the leveling compound to the bare aluminum surface.
(5) S 598-013Mix the base and catalyst, refer to the supplier's instructions.
(6) S 398-007Apply the leveling compound. The leveling compound must be level with the top of the drain hole or the bottom of the drain valve retainer opening.
NOTE:____ The airplane must be in a level or taxi attitude when you apply the leveling compound and stay that way until the leveling compound is cured (6 hours at 72 |5°F). Full cure takes 7 days.
(7) S 218-008After the leveling compound is cured, make sure the drain holes are open and that there is no water in the drain.
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747-400 MAINTENANCE MANUAL
INTERNAL DRAINAGE - INSPECTION/CHECK
____________________________________
1. General_______
A. This procedure contains three tasks:
(1)
The first task is to examine the internal drains.
(2)
The second task is to examine the conditioned air condensate drains.
(3)
The third task is to clean the drains.
B. You must examine the internal drains with a regular schedule to make sure the drainage operates correctly. The internal drains are drained overboard by the external drains (AMM 51-41-01/601).
C. At a given conditions, the water that comes from the airplane air conditioning system collects in the conditioned air plenums.
D. The drain holes to remove the water are in the plenums, floor beams, and at the intersection of the wing center section upper surface and rear spar.
E. If the drain holes in the conditioned air plenum are sealed, the water can collect in the plenum, and slowly will move to the conditioned air distribution system of the passenger area.
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