747-400 AMM 飞机维护手册 STANDARD PRACTICES - AIRFRAME(62)

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 1) For tedlar, teflon, and solvent resistant finishes, use a
 solvent, Series 98 (AMM 20-30-98/201). 2) For acrylic surfaces, use naphtha, TT-N-95, Type II. 3) For all other surfaces and for hydraulic fluid
 contamination, use BMS 3-2.
 (c)  Use a polyethylene bottle to apply solvent to the work surface or to a clean wiper.
 NOTE: Do not put the wiper into the solvent container.
____
 (d)  
Rub the surface with a wiper or a soft brush.

 (e)  
Rinse the surface with clean solvent. Use clean wipers.

 (f)  
Remove unwanted solvent. Let the surface drain, then rub dry.

 S 117-004
 (4)  Clean the surface again:
 (a)  Put solvent on a clean wiper.
 NOTE: Do not put the wiper into the solvent container.
____
 (b)  Rub the surface with a solvent-soaked wiper. Immediately rub dry with a clean, dry wiper.
 NOTE: Do not let the solvent air dry.
____
 (c)  
Replace the dirty wipers frequently with clean ones.

 (d)  
Do the last three steps until the wiper shows no dirt.

 NOTE: If a clean surface becomes dirty, clean it again.
____
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747-400
MAINTENANCE MANUAL

 S 127-005
 (5)  For plastic laminates and painted surfaces, do these steps:
 (a)  If necessary, clean the surface.
 CAUTION: DO NOT SAND THE PAINTED SURFACE AROUND THE DECAL EDGE IF
_______ CLEAR HYDRAULIC FLUID RESISTANT COATING WAS USED AS AN EDGE SEALER FOR THE DECAL. DAMAGE TO THE SEAL CAN OCCUR.
 (b)  
Lightly sand the surface with 280-grit or finer abrasive paper.

 (c)  
Do again the two steps to clean the surface.

 F.  Install Stencil Markings
 S 427-006
 (1)  Install the stencil.
 (a)  
Make sure all stencil cuts are sharp and clear of burrs.

 (b)  
Attach stencil tightly so paint does not go under the edges.

 S 377-015
 (2)  Use a marking enamel or lacquer that agrees with the surface finish.
 (a)  
In areas requiring a hydraulic fluid resistance finish, apply BMS 10-11, Type II enamel.

 (b)  
Where no special finish is required, apply BMS 10-60 enamel.

 S 377-007
 (3)  Prepare the stencil paint.
 (a)  To prepare BMS 10-79, Type II or BMS 10-60, Type II (AMM 51-24-11/701).
 WARNING: KEEP MATERIAL IN AN OPEN CONTAINER TO PREVENT
_______ CONCENTRATION OF HYDROGEN GAS. EC 942 REACTS CHEMICALLY WITH METAL AND RELEASES FLAMMABLE HYDROGEN GAS.
 (b)  To prepare EC 942 Black (Corogard 12), do these steps: 1) Shake base mixture immediately before you make it thin.
 CAUTION: DO NOT ADD A VOLUME OF THINNER THAT IS MORE THAN
_______ ONE-FIFTH THE VOLUME OF THE BASE MATERIAL.
 2)  Make the base material thin with a mixture (by volume) of 5/8 methyl isobutyl ketone and 3/8 butyl acetate.
 NOTE: You can use the material for as much as 16 hours
____ after you mix it (pot life is 16 hours). Do not use the material after 16 hours.
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747-400 MAINTENANCE MANUAL
 S 387-016
 WARNING:_______ DO NOT BREATHE THE FUMES OF FINISHES AND SOLVENTS.  DO WORK IN
 A WELL-VENTILATED AREA.  USE APPROVED RESPIRATORY PROTECTION AS
 NECESSARY.  DO NOT GET FINISHES AND SOLVENTS IN EYES OR ON SKIN
 AND CLOTHING.  KEEP MATERIALS AWAY FROM SOURCE OF IGNITION.
 FINISHES AND SOLVENTS ARE TOXIC AND FLAMMABLE.  THEY CAN CAUSE
 INJURY OR DAMAGE.
 CAUTION:_______ DO NOT APPLY FINISHES WHEN AMBIENT TEMPERATURE IS LESS THAN 50
 DEGREES FAHRENHEIT OR RELATIVE HUMIDITY IS MORE THAN 85
　
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