S 348-029
WARNING:_______DO NOT TOUCH THE ADHESIVES OR BREATHE THE VAPORS. THE ADHESIVE COMPOUND CONTAINS EPOXY RESINS. THE ADHESIVE CAN CAUSE INJURY TO PERSONS.
(3) Mix the adhesive. If the adhesive is a four-component system, do the steps that follow:
(a)
Mix 80 parts (by weight) of Epon 828 or DER 331, and 20 parts (by weight) Heloxy 68 to make component A.
(b)
Mix equal parts (by weight) of Versamid 115 and Versamid 125 to make component B.
(c)
Mix equal parts (by weight) of components A and B to make the adhesive mixture.
S 348-030
(4) Bond a piece of decorative laminate of proper color, design and texture to a piece of foam with the adhesive mixture. Let the ashesive cure.
NOTE: The foam thickness must be the same thickness as the
____
honeycomb core from the damaged area.
S 498-031
(5) Attach a template to a piece of foam with the double-backed tape.
NOTE: The hole diameter of the foam must equal the inner diameter
____
of the cutter.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
25-00-00
ALL ú ú 01A Page 818 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 348-100
(6) Cut out a repair plug from the piece of foam.
S 348-101
(7) Rub the repair plug with abrasive paper if it is necessary to get a
satisfactory fit.
S 348-053
(8) Bond the repair plug in the cutout with the adhesive mixture.
NOTE:____ Use the minimum quantity necessary to get a
satisfactory bond.
S 348-035
WARNING: DO NOT GET TUF-ON P-24A IN YOUR MOUTH OR EYES, OR ON YOUR SKIN.
_______ DO NOT BREATHE THE FUMES. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES. TUF-ON P24A CONTAINS PHENOLIC RESINS WHICH CAN CAUSE INJURY TO PERSONS.
(9) Fill the clearance around the repair plug with TUF-ON P-24A.
NOTE: Apply more than is necessary to make sure the clearance
____ is fully filled. The unwanted material is removed in the subsequent step.
S 348-055
(10)
Let the TUF-ON P-24A cure.
S 958-037
(11)
Apply masking tape to the area around the repair.
S 348-038
(12)
Rub the TUF-ON P-24A with 240- to 320-grit abrasive paper until it is smooth and level with the adjacent surfaces.
S 378-039
(13)
Apply silk screen ink of the correct color to match the adjacent area.
S 378-040
(14)
Let the ink dry for 15 minutes.
S 498-041
(15)
Apply the silicone embossing pad to the surface you repaired and then apply vacuum pressure (approximately 10 inches of Hg). Keep this configuration until the surface is cured (15 minutes at 160°F).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
25-00-00
ALL ú ú 01A Page 819 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
E. Repair Panels with Compound Curvature
S 348-044
(1)
Attach a template with the correct hole diameter on the damaged area with the double-backed tape.
S 348-102
(2)
Cut out the damaged area; go through the full thickness of the panel (the non-decorative skin too).
NOTE: In areas where you cannot use a template, do the steps that
____
follow:
(a)
Drill a 1/4 inch hole through the damaged area.
(b)
Use a hole saw with a 1/4 inch pilot to remove the damaged area.
S 348-103
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 EQUIPMENT/FURNISHINGS 1(15)
