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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
PROTECTIVE FINISHES - DESCRIPTION AND OPERATION
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1. General_______
A. The following sections provide the procedures for application of finishes for protection of aluminum, steel, titanium, and nonmetallic surfaces from contamination from chemicals and other environments. They also provide for application of finishes for protection of fiberglass from static electricity buildup, protection of metal from wear and other purposes.
2. Protective Finishes___________________
A. The following protective finishes are used to protect airplane parts.
(1)
Chemical and solvent resistant finish is used for general purpose corrosion protection on the interior and exterior of the airplane.
(2)
Clear fire resistant hydraulic fluid resistant finish is used to protect surfaces, other than titanium at 250°F and above, from fire resistant hydraulic fluid contamination.
(3)
The conductive coating system for exterior fiberglass is used to prevent static electricity buildup on fiberglass.
(4)
Abrasion resistant Teflon finish is used to protect faying surfaces from chaffing.
(5)
Velvet coating for nonglare areas is used to provide a dull finish where it is required. For other finishes, used as airline options, in nonglare areas, refer to applicable exterior decorative markings drawing.
(6)
The BMS 10-100 paint system is used to protect against corrosion on the wing upper and lower inspar skins and the horizontal stabilizer upper and lower inspar skins.
(7)
High temperature coating for titanium is used to protect titanium from fire resistant hydraulic fluid at 250°F and above.
(8)
Nonskid surface coating is used to provide nonskid surfaces in required areas on the airplane.
(9)
Heat, weather, and oil resistant inorganic protective coating BMS 14-4 is used for corrosion protection, but is not effective above 900°F.
(10)
Decorative paint system is a polyurethane system recommended for exterior decorative markings. It also provides corrosion protection in some areas.
(11)
Temporary 558B coating is intended for use over the permanent finish and can be removed at a later date without affecting the underlying finish of polyurethane enamels.
(12)
BMS 3-23 and BMS 3-26 are used as a corrosion inhibitive compound.
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747-400 MAINTENANCE MANUAL
(13) BMS 5-89 corrosion inhibiting adhesive primer (CIAP) is required production primer for all structural bonded assemblies. The structural bonded assembly receives a subsequent coating of BMS 10-11 or BMS 10-79 primer on top of CIAP. In instances where service experience has shown that corrosion is not a problem, the CIAP is left uncoated.
3. Equipment_________
A. Clean and proper equipment is essential to good finishing. Equipment air lines have filters to eliminate contamination from oil, grit, and water droplets. Filters are checked and blown out at least twice a day when in use.
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51-24-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
CHEMICAL AND SOLVENT RESISTANT FINISH - CLEANING/PAINTING
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