747-400 AMM 飞机维护手册 结构 STRUCTURES(16)

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 (2)  
If it is necessary, add more toluene to keep the cloths moist. Permit sufficient time to loosen the coating from the fiberglass (20 minutes to 1 hour).

 (3)  
Scrap or peel off the coating.

 (4)
Lightly rub the surface with 240 grit (minimum) abrasive paper.

 (5)  
Clean with xylene solvent.

 S 157-010
 S 127-007
 S 117-008
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 INTERIOR AND EXTERIOR FINISHES (PREPAINT CLEANING AND PRETREATMENT) -
_____________________________________________________________________ CLEANING/PAINTING
_________________
 1.  General_______
 A. This procedure contains 3 tasks:
 (1)  
The first task is to clean the surface before you apply paint.

 (2)  
The second task is to prepare the surface before you apply paint.

 (3)  
The third task is to clean and prepare plastic surfaces before you apply paint.

 TASK 51-21-02-107-001
 2.  Clean the Surface_________________
 A. Equipment
 (1)  
Wood or plastic scrapers; Commercially
 available

 (2)  
Stiff bristle brush; Commercially available

 (3)  
Spray equipment; Commercially available

 B. Consumable Materials
 (1)  
Masking Materials

 (a)  
Aluminum foil tapes
 1) G00117 Permacel P-112
 2) G00291 Scotch No. 425

 (b)  
Masking tapes
 1) G00366 Permacel P-705
 2) G00132 3M No. 214
 3) G00367 Mystic 6223

 (c)  
G00111 Plastic film mylar or polyethylene

 (d)  
G00365 Polyethylene coated paper,
 VV-P-272C

 (e)  
G00301 Protex 20V

 

 (2)  
Solvents

 (a)  
G00148 Methyl Ethyl Ketone (MEK) -TT-M-261

 (b)  
B00135 Naphtha

 (c)  
B00151 Methyl Iso-Butyl Ketone (MIBK) TT-M-268

 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (d)  
B00153 Toluene (Toluol) TT-T-548 or
 JAN-T-171 Grade A

 (e)  
1:1 MEK-Toluene Mixture

 (f)  
B00189 Thinner, TL-52

 (3)  
B00280 Stripper - Turco 5351

 (4)  
G00034 Cheesecloth

 (5)  
Other Materials

 (a)  
G00251 Aluminum oxide abrasive paper, 240-grit (minimum)

 (b)  
B00340 Silicon carbide paper, 240-grit
 (minimum)

 (c)  
B00102 Silicon carbide abrasive disc (Bear
 Tex) 240-grit (minimum)

 (d)  
B00107 Scotchbrite sheets, Type A,
 Aluminum Oxide Abrasive 240-grit
 (minimum)

 (e)  
B00101 Nylon pad, Aluminum Oxide Abrasive,
 Type F, 240-grit (minimum)

 (f)  
B00137 Abrasive paper 240-grit (minimum),
 P-P-121

 

 

 C. References
 (1)  
51-21-01/701 - Interior and Exterior Finishes (Paint Stripping)

 (2)  
51-21-04/701 - Alodized Surfaces

 (3)  
51-24-11/701 - Decorative Paint System

 (4)  
51-31-01/201 - Seals and Sealing

 D. Procedure - Clean the Surface
 S 917-002
 CAUTION: DO NOT APPLY SOLVENTS, CLEANERS, AND ALODINE ON SEALANTS AND
_______ SMOOTHERS. SOLVENTS, CLEANERS AND ALODINE CAN REACT CHEMICALLY WITH SEALANTS AND SMOOTHERS AND CAUSE DAMAGE.
 (1)  
Put covers on all adjacent areas.
　
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