(8)
B00569 Paste - Fine Polishing, Schaffner
No. AS0410
(9)
B00570 Polish - Turco 1495-X
(10)
G00033 Wiper - BMS 15-5D, Class A
C. References
(1) 51-21-31/701, Alodine Coating
D. Prepare to Polish the Surface
S 102-017
(1) Do the procedure to clean the External Surfaces of the Airplane procedure to clean the surfaces you will polish.
E. Polish the Surface
S 602-035
WARNING:_______DO NOT POLISH THE STATIC PORTS. IF POLISHING MATERIAL ENTERS THE STATIC PORTS, IT MAY CAUSE LARGE ERRORS IN AIRSPEED-SENSING AND ALTITUDE-SENSING SIGNALS, WHICH MAY LEAD TO LOSS OF SAFE FLIGHT.
(1) PROCEDURE I - Polish the surface to repair light stains or to make the surface bright.
(a) Use the wiper to remove the outer layer of protection when it is necessary.
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A
737-300/400/500MAINTENANCE MANUAL
(b) Manually or mechanically polish the surface as follows: 1) ALTERNATIVE I - Manually polish the surface. a) Apply AS-0410 fine polishing paste or Turco 1495-X
polish to the BMS 15-5D Class A wiper. b) Rub the damaged area of the surface with the wiper.
NOTE: Rub the metal in the direction of the grain
____ until you get the necessary finish.
2) ALTERNATIVE II - Mechanically polish the surface. a) Apply AS-0410 fine polishing paste or Turco 1495-X polish to the BMS 15-5D Class A wiper. b) Polish the damaged area of the surface with the orbital sander/polisher that is operated by air.
(c) Remove the remaining polish material with solvent and wipers.
NOTE: Always rub the metal in the direction of the grain.
____
(d) If it is necessary, use ALTERNATIVE I or II to polish the surface again.
NOTE: If the polished area is too bright, rub the area with
____ an ultrafine Scotch-Brite pad. Remove the dried polish with solvent and wipers.
(e)
Rub the area around the polished area to get a constant finish.
(f)
Do the Clean the External Surfaces of the Airplane procedure in the polished area.
(g)
Put some water on the surface, and make sure the water becomes drops.
(h)
If the surface was conversion coated before it was polished, apply Alodine 1000 with a swab, cloth, or sponge (Ref 51-21-31).
S 602-019
(2) PROCEDURE II - Polish the surface to remove heavy stains or scratches that do not go through the clad aluminum.
(a) Use these steps to find if the scratch went through the clad aluminum: 1) Apply BMS 3-2 cleaning solvent to a wiper. 2) Use the wiper to clean the area around the scratch. 3) Dry the surface. 4) Apply masking tape around the scratch.
NOTE: Make sure there is no more than 1/32-inch of bare
____ metal around the scratch.
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A 737-300/400/500MAINTENANCE MANUAL
WARNING: DO NOT GET CLAD PENETRATING SOLUTION IN YOUR EYES, ON
_______ YOUR SKIN, OR ON YOUR CLOTHES. IF YOU GET CLAD PENETRATING SOLUTION IN YOUR EYES, IMMEDIATELY FLUSH YOUR EYES WITH WATER. IF YOU GET CLAD PENETRATING SOLUTION ON YOUR SKIN, IMMEDIATELY FLUSH YOUR SKIN WITH WATER. MAKE SURE YOU PUT ON SPLASH GOGGLES OR A FACE SHIELD. MAKE SURE YOU PUT ON CHEMICAL RESISTANT GLOVES WHEN YOU PREPARE THE CLAD PENETRATING SOLUTION.
5) Prepare the clad penetrating solution as follows:
a) Mix 200 grams of Potassium Nitrate (KNO3) and 100 grams of Sodium Hydroxide (NaOH) with sufficient water to make one liter of clad penetrating solution.
WARNING: DO NOT GET CLAD PENETRATING SOLUTION IN YOUR EYES, ON
_______ YOUR SKIN, OR ON YOUR CLOTHES. IF YOU GET CLAD PENETRATING SOLUTION IN YOUR EYES, IMMEDIATELY FLUSH YOUR EYES WITH WATER. IF YOU GET CLAD PENETRATING SOLUTION ON YOUR SKIN, IMMEDIATELY FLUSH YOUR SKIN WITH WATER. MAKE SURE YOU PUT ON SPLASH GOGGLES OR A FACE SHIELD. MAKE SURE YOU PUT ON CHEMICAL RESISTANT GLOVES WHEN YOU APPLY THE CLAD PENETRATING SOLUTION.
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