51-24-01
ALL ú ú 01 Page 701 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FIRE RESISTANT HYDRAULIC FLUID RESISTANT FINISH - CLEANING/PAINTING
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1. General
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A. This procedure contains two tasks. The first task is to clean the surface. The second task is to apply the finish.
TASK 51-24-02-107-001
2. Clean the Surface
_________________
A. Consumable Materials
(1)
G00382 Paper - Abrasive, Aluminum Oxide, 280
Grit or Finer
(2)
B00192 Solvent - General Purpose - BMS 3-2,
Type I
(3)
B00005 Cleaner - Alkaline Manual, CEEBEE 280
(4)
G00027 Cheesecloth - Boiled, No. 301,
Rymplecloth, The Kendall Company
B. References
(1) AMM 12-25-01/301, Airplane Servicing (Exterior Cleaning)
C. Procedure
S 127-002
(1) Rub the surface:
(a) Rub the high gloss plastic surfaces and painted surfaces with 280 grit (minimum grit number) abrasive paper. Remove the high gloss surface finish.
NOTE: Do not rub around the decals of painted surfaces when
____ clear hydrualic fluid resistant finish is used as an edge sealer.
S 117-003
(2)
Clean the decals, placards, and stencils with alkaline cleaner. Apply the cleaner with a clean cheesecloth (Ref 12-25-01/301).
S 117-004
(3)
Clean all the other surfaces:
(a)
Rub the surface with a clean cheesecloth that is moist with solvent.
(b)
Before the solvent is dry, rub the surface with a clean, dry cheesecloth.
(c)
Do steps (a) and (b) again until no unwanted material is found when you rub the surface with a clean cloth.
TASK 51-24-02-307-005
3. Apply the Finish
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A. Consumable Materials
(1)
C00179 Finish - Grade A, Finch 683-3-2
(2)
C00032 Finish - Grade A, X-310 Catalyst
(3)
G00371 Brush - Cleaning, Nylon or Bristle
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51-24-02
ALL ú ú 01 Page 701 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
B. Mix the Materials
S 377-006
(1) Mix the base component with the catalyst as follows:
NOTE: Use clean containers to make the mixture. Do not use
____
containers lined with organic finish.
(a)
Mix 1 part of X-310 with 2 parts of 683-3-2 by volume. Add the catalyst to the base while you stir the base component.
(b)
Make sure there is an equal distribution of the components in the mixture.
NOTE: When the mixture is ready for use, put a lable on the
____ container that shows the date and the hour the mix was made and the hour the pot life will expire (par. 3.B.). The catalyzed finish material has a pot life of 4 hours at 70°F. Discard any catalyzed finish material whose pot life has expired. The use of a finish that has exceeded its pot life will affect how well the finish protects. Store finish that has not catalyzed at a temperature of between 40°F and 90°F. The shelf life of finish that has not catalyzed is 12 months from the date that it is manufactured.
C. Apply the Finish
S 117-007
(1) Clean all of the surfaces as shown in paragraph 2, before you apply the finish.
NOTE: When a finish is applied over a sealant, let the sealant cure
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