51-41-11
 ALL  ú ú B02 Page 602 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 EXTERNAL DRAINAGE - APPROVED REPAIRS
____________________________________
 1.  General_______
 A.  This procedure contains one task. The task is to repair the compound used to level the area around the aircraft drains.
 TASK 51-41-11-358-009-B00
 2.  Repair the Compound Used to Level the Area Around the Aircraft Drains_____________________________________________________________________
 A.  Equipment
 (1)  
Hardwood wedge

 (2)  
Rigid-bristle brush

 B.  Consumable Materials
 (1)  
B01010 Solvent - Final Cleaning of Solvent Resistant Organic Coatings prior to Non-structural Bonding (Series 90) (AMM 20-30-90 or SOPM 20-30-90)

 (2)  
G00034 Cheesecloth - New, Clean, Dry, Lint Free

 (3)  
A00025 Adhesive - Epon 815

 (4)  
A00246 Leveling Compound and Catalyst - BMS 5 - 125 Type II or III as required, (Optional BMS 5-95, Class B)

 (5)  
A00964 Primer - BMS 10-11 Type I

 C.  References
 (1)  
20-30-11, Adhesives, Cements and Sealers

 (2)  
20-30-31, Cleaners and Polishers

 (3)  
51-21-41, Alodine Coating

 D.  Procedure
 S 348-003-B00
 (1)  Use a hardwood wedge or a rigid-bristle brush to remove compound that is loose or damaged.
 S 118-001-B00
 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.
 (2)  
Use a cloth that is moist with solvent to clean the structure and any compound that remains on the surface.

 S 378-002-B00

 (3)  
For an aluminum surface that does not have a protective layer, do these steps.

 (a) Apply a layer of Alodine 1200 (Ref 51-21-41).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 51-41-11
 ALL  ú ú B02 Page 801 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (b)  Apply one layer of primer to the surface of the aluminum.
 (4)  S 348-004-B00Mix the compound and the catalyst.
 (5)  S 348-005-B00Pour the mixture around the drain.
 (6)  S 348-008-B00Make sure the compound is level with the top of the drain hole or the bottom of the drain valve retainer opening.
 NOTE:____ Make sure the airplane is in a level position when you pour the compound. Do not move the airplane before the compound is hard (approx. 6 hours at 72 +/- 5 degrees). The full cure time is 7 days.

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 51-41-11
 ALL  ú ú B02 Page 802 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 INTERNAL DRAINAGE - INSPECTION/CHECK
____________________________________
 1.  General_______
 A.  This procedure contains one task:
 (1)  The task is to examine the internal drainage.
 B.  You must examine the internal drains with a regular schedule to make sure the drainage operates correctly, and to help prevent a fire or corrosion.
 TASK 51-41-12-206-001-B00
 2.  Examine Internal Drains_______________________
 A.  Consumable Materials
　
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