(15)
G00382 Paper - Abrasive, Aluminum Oxide, 240 Grit (Minimum)
(16)
B00340 Paper - Abrasive, Silicon Carbide, 240 Grit (Minimum)
(17)
Fabric or Pad - Abrasive, Very Fine or Ultrafine
(a)
B00107 Aluminum Oxide, Scotchbrite, Type A
(b)
B00102 Aluminum Oxide, Bear - Tex
(c)
B00102 Silicon Carbide, Bear - Tex
(18)
B00102 Disk - Abrasive, Silicone Carbide (Bear Tex) 240 Grit or Finer
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51-21-21
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
C. References
(1) AMM 51-31-00/201, Seals and Sealing
D. Clean the Surface
S 957-036-B00
CAUTION: SEALANTS AND SMOOTHER CAN BE DAMAGED DURING PREPAINT CLEANING
_______ OPERATIONS. DAMAGED SEALANT AND SMOOTHER WILL NOT BOND TO THE SURFACE AND MUST BE REMOVED.
(1)
Put covers on all adjacent areas.
S 167-002-B00
(2)
Clean the surface.
NOTE: Do not clean anodized surfaces with abrasive disks, fabrics,
____ pads, or paper if you will not paint the surfaces.
(a)
Remove all temporary protective coatings.
(b)
Use a spray gun to remove all the remaining stripper material, loose dust particles and contamination.
(c)
Use water, at a temperature between 135 to 145°F, and at a rate of 10 to 20 gallons per minute.
WARNING: DO NOT GET METHYL ETHYL KETONE (MEK) IN YOUR MOUTH OR
_______ EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM MEK. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES WHEN YOU USE MEK. KEEP MEK AWAY FROM SPARKS, FLAME, AND HEAT. MEK IS A POISONOUS AND FLAMMABLE SOLVENT WHICH CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
CAUTION: BE CAREFUL WHEN YOU CLEAN AROUND THE FASTENERS, SEAMS AND
_______ LAP JOINTS. THIS IS TO PREVENT DAMAGE TO THE FASTENERS, SEAMS AND LAP JOINTS.
(d) Use a rigid bristle brush that is moist with MEK and toluene
(1:1 mixture by volume) to clean around fasteners, seams and lap joints.
NOTE: You can isolate the sealant bead from the skin when you
____ clean with MEK and Toluene. Do not do a test of the sealant bead bond with your fingernail or with a knife. Only do a visual inspection of the interface between the sealant bead and the skin.
S 357-003-B00
(3) Repair all damaged sealant (AMM 51-31-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 127-004-B00
(4)
Remove the sealant bead where the separation occurs between the body of the sealant bead and the airplane skin.
S 167-005-B00
(5)
If the separation is confined to the thin edge of the sealant bead, do these steps:
(a)
Remove the sealant where the separation occurs with MEK or a
1:1 solution of MEK and toulene.
(b)
Carefully rub the surface with abrasive paper, fabric or a pad.
S 127-006-B00
(6) Use silicon carbide paper to make the stainless steel and titanium surfaces rough.
NOTE: The surfaces with aluminum flame-sprayed fiberglass or
____ Alodine 1200 must not be made rough.
S 117-007-B00
(7) Clean the surface with a 1:1 solution of MEK and toulene before you paint the surface.
(a) Clean the surface until you can see no signs of dirt on a cheesecloth.
TASK 51-21-21-307-014-B00
3. Surface Pretreatment
____________________
A. Equipment
(1) Tack Rags; Commercially available
B. Consumable Materials
(1)
B00325 Cleaner - Alkaline, Jet Clean E
(2)
B00335 Cleaner - Alkaline, TEC 86-2
(3)
B00189 Solvent - Thinner, TL-52
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