(f)  
B00189 Thinner, TL-52

 (3)  
Alkaline Cleaners

 (4)  
G00034 Cheesecloth

 (5)  
Miscellaneous Materials

 (a)  
G00251 Aluminum Oxide Abrasive Paper, 240-grit (minimum)

 (b)  
B00340 Silicon carbide paper, 240-grit (minimum)

 (c)  
B00102 Silicon carbide abrasive disc (Bear Tex) 240-grit (minimum)

 (d)  
B00107 Scotchbrite sheets, Type A, Aluminum Oxide Abrasive 240-grit (minimum)

 (e)  
B00101 Nylon pad, Aluminum Oxide Abrasive, Type F, 240-grit (minimum)

 (f)  
B00137 Abrasive paper 240-grit (minimum), P-P-121

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 51-21-02
 ALL  ú ú 01 Page 704 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (g)  C00064 Conversion Coating, MIL-C-5541 (Alodine)
 C. References
 (1)  
51-21-01/701 - Interior and Exterior Finishes (Paint Stripping)

 (2)  
51-21-04/701 - Alodized Surfaces

 (3)  
51-24-11/701 - Decorative Paint System

 (4)  
51-31-01/201 - Seals and Sealing

 D. Procedure - Prepare the Surface
 S 377-011
 CAUTION: FOLLOW THE NECESSARY PRECAUTIONS WHEN YOU CLEAN AROUND
_______ FASTENERS, SEAMS AND LAP JOINTS. IF YOU ARE NOT CAREFUL, DAMAGE TO THE FASTENERS, SEAMS, AND LAP JOINTS CAN OCCUR.
 (1)  Procedure Method I: (Before you apply wash or epoxy primer system without alodizing)
 (a)  
Prepare the alkaline cleaner, mix 1 part (by volume) of cleaner with 3 parts (by volume) of water.

 (b)  
Use abrasive pads and alkaline cleaner to make the surface rough.

 (c)  
Flush the surface with water until you get a water break-free surface. Make sure you flush all unwanted material from the joints and fasteners.

 NOTE: A water break-free surface will have a continuous layer
____
 of water for 30 seconds.

 (d)  
Before you apply the primer, let the surfaces, seams and lap joints fully dry.

 (e)  
Apply primer on the surface.

 S 377-012
 (2)  Procedure Method II: (before you apply an epoxy primer system with alodizing)
 CAUTION:_______DO NOT MIX SOLVENTS WITH ALODINE. A FIRE CAN OCCUR IF THE SOLVENTS ARE MIXED WITH ALODINE.
 (a)  
Use Scotchbrite sheets and clean water to make the surface rough.

 (b)  
Use a cheesecloth that is moist with water to clean the surface. Clean the surface again to remove all remaining particles.

 (c)  
Flush the surface with water until you get a water break-free surface. Make sure you flush all unwanted material from the joints and fasteners.

 NOTE: A water break-free surface will have a continuous layer
____
 of water for 30 seconds.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 51-21-02
 ALL  ú ú 01 Page 705 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 WARNING: DO NOT GET ALODINE IN YOUR MOUTH, IN YOUR EYES, ON YOUR
_______ SKIN, OR ON YOUR CLOTHES. DO NOT BREATHE THE FUMES FROM THIS MATERIAL. MAKE SURE THE AIR FLOWS FREELY THROUGH THE WORK AREA. USE THE NECESSARY RESPIRATORY PROTECTION. KEEP THIS MATERIAL AWAY FROM SPARKS, FLAME, AND HEAT. THIS MATERIAL IS POISONOUS AND FLAMMABLE AND CAN CAUSE INJURY OR DAMAGE.
 (d)  
Apply Alodine 1000, 1200 or 1200S (Ref 51-21-04).

 (e)  
Before you apply the primer, let the surfaces, seams and lap joints fully dry.

 (f)  
Apply BMS 10-79 type II primer (preferred) or BMS 10-11 primer (optional) on the surface.

 S 377-013
 (3)  Do these steps to prepare surfaces that are painted:
 (a) For epoxy primer that was applied in less than 48 hours:
 1)  Use abrasive papers or pads to remove rough surfaces and loose soils. Rub the surface until it is smooth.
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 結構 STRUCTURES(18)