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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
(3) S 147-041-B00Carefully flush the surface with a clean cheesecloth that is moist with water. Start from the bottom.
NOTE:____ Be careful when you rub or dry the surface. Do not remove the coating or cause scratches on the surface.
(4) S 147-042-B00Lightly rub the surface with a clean dry cheesecloth to remove unwanted liquid. Rub the surface until the liquid is gone.
(5) S 107-043-B00Immediately after use, fully clean the cloths in water and keep them in a container filled with water.
(6) S 917-044-B00Air dry the surface.
NOTE:____ Dry at 120 degrees F (optimum), 130 degrees F (maximum).
(7) S 377-045-B00Apply the last finish or start adhesive bonding (Chapter 51 of the Structural Repair Manual). Touch the parts or surface with clean gloves and keep the parts or surface dry and clean to prevent surface contamination.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
MAGNESIUM - CLEANING/PAINTING (CONVERSION COATING)
__________________________________________________
1. General_______
A. This procedure contains one task. The task is the application of conversion coating to magnesium parts.
TASK 51-21-51-357-007-B00
2. Apply Conversion Coating________________________
A. General
WARNING: CLEANING AND CONVERSION COATING SOLUTIONS CONTAIN POISONOUS AND
_______ FLAMMABLE MATERIALS. CLEANING AND CONVERSION COATING SOLUTIONS CAN CAUSE DAMAGE TO EQUIPMENT OR INJURY TO PERSONS.
(1) Obey this warning during all of this task.
B. Consumable Materials
(1)
G00371 Brush - Soft-Bristle
(2)
B00004 Cleaner - Waterbase Alkaline - Kelite 28
(3)
Magnesium oxide
(4)
C00015 Coating - Conversion (Magnesium)
(5)
G00549 Acid - Chromic
(6)
E00197 Calcium Sulfate (Powder)
(7)
B00232 Sodium Hydroxide
(8)
E00069 Acid - Sulfuric
(9)
A00322 Paper - Abrasive, Aluminum Oxide, 240 grit or Finer
(10)
G00238 Gauze - Clean
(11)
G00034 Cheesecloth - Clean and Lint-Free
(12)
G00115 Polyethylene Sheet
(13)
G00253 Paper - Greaseproof
(14)
G000257 Paper - Laminated Waterproof
(15)
G00217 Sponge
C. Procedure - Apply Conversion Coating
S 127-002-B00
WARNING:_______MAGNESIUM POWDER CAN CAUSE A FIRE. DAMAGE TO EQUIPMENT OR INJURY TO PERSONS CAN OCCUR.
(1)
Rub the surface with abrasive paper (240 grit maximum).
S 167-006-B00
(2)
Clean the surface as follows:
(a) Remove all loose particles from the surface with a soft-bristle brush or rub the surface with a clean gauze.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
CAUTION: PROTECT ALL SURFACES THAT YOU DO NOT WANT TO CLEAN.
_______
CLEANER CAN DAMAGE FINISH, CADIUM AND ALUMINUM.
(b)
Apply protection to all areas that you do not want to clean. Use a material that will resist water. For example, use polyethylene sheet, greaseproof paper, or laminated waterproof paper.
(c)
To prepare the cleaning solution, mix 10 volumes of water to 1 volume of Kelite 28.
CAUTION: DO NOT ALLOW THE CLEANING SOLUTION TO STAY IN FAYING
_______ SURFACES. DAMAGE TO THE FAYING SURFACES CAN OCCUR IF YOU PERMIT THE CLEANING SOLUTION TO STAY ON THE SURFACE.
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