NOTE:____The gas from the compound can be volatile. You must remove the gas before you close the access panels that will hold the gas in the closed areas.
TASK 51-24-13-107-016
4. Corrosion Preventive Compound - Removal_______________________________________
A. General
(1) The corrosion preventive compound can come through skin fasteners. It will be a brown color on the airplane.
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A
747-400
MAINTENANCE MANUAL
B. References
(1) AMM 20-30-02/201, Cleaners and Polishes
C. Consumable Materials
(1)
B00535 Solvent - Perchlorethylene, Technical, O-T-236
(2)
B00115 Solvent - Trichlorothane, O-T-620
(3)
B00083 Solvent - Alphatic Naphtha, TT-N-95
(4)
B00722 Solvent - Stoddard, P-D-680
(5)
G00034 Cheesecloth - Clean and Lint-Free
D. Procedure
S 117-017
(1) To remove the unwanted corrosion preventative compound from the airplane, use one of these solvents (AMM 20-30-02/201):
-Perchlorethylene
-Trichlorethane
-Naphtha
-Stoddard Solvent
NOTE: Methyl Ethyl Ketone (MEK) or Acetone is not recommended.
____ You must make sure the air flow is sufficient while you remove the corrosion preventive compound and until the area is dry.
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A
747-400 MAINTENANCE MANUAL
RAIN EROSION RESISTANT COATING - CLEANING/PAINTING
__________________________________________________
1. General_______
A. This procedure contains one task:
(1) The task is to apply the rain erosion resistant coating on the nose radome.
TASK 51-24-17-307-001
2. Nose Radome Painting - Rain Erosion Resistant Coating_____________________________________________________
A. General
WARNING:_______THE COATING MATERIALS ARE TOXIC AND FLAMMABLE. HAVE SUFFICIENT AIR FLOW AND OBEY THE CORRECT FIRE PRECAUTIONS WHEN YOU MIX AND APPLY THE MATERIALS.
CAUTION:_______THE COATING IS VERY SENSITIVE TO THE PERMANENT STAIN. DO NOT TOUCH THE COATING WITH DYED MATERIAL. DYE CAN PERMANENTLY STAIN THE COATING.
(1)
The rain erosion resistant coating prevents the erosion by the rain, and prevents the radome structure from the weather and the moisture.
(2)
To control the environment, each coat thickness and recoat cure time is important to give a bubble free, adherent and erosion resistant coating.
(3)
The erosion resistant coating system has a primer (1.0 |0.5 mils) and an erosion resistant material (12.0 |2.0 mils).
(4)
To get a good quality coating, the area that you apply the coating must be clean and free of the dust, lint or other contamination.
(5)
The coating cures only by the effect with air moisture. An unsatisfactory quality coating and extended cure time is a result when the humidity is less than 40% at 70°F.
B. References
(1)
AMM 20-30-94/201, Solvent - Series 94
(2)
SOPM 20-30-94, Final Cleaning Prior to Application of Rain Errosion Resistant Coating
C. Equipment
(1)
Spraying Equipment
(2)
No. 2 Zahn Cup
D. Consumable Materials
(1)
G00268 Brush - Soft Bristle (Nylon)
(2)
G00034 Cheesecloth - Clean and Lint-Free
(3)
G00381 Paper - Abrasive, Aluminum Oxide 180 Grit
(4)
C00000 Astrocoat Kit - 7100, Polyurethane Erosion Coating (Includes Coating, Primer, Accelerator and Thinner)
(5)
C00000 Caapcoat - Fluoroelastomer, Type 2, ASM
3138/2
(6)
B00148 Solvent - Methyl Ethyl Ketone (MEK), TT-M-261
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