(W) Compatible substrate primer--Either compatible
epoxy primer or adhesive primer. Compatible epoxy primer is primer
that is compatible with the filled elastomeric coating and is epoxy
based. The compatible substrate primer is an epoxy-polyamide primer
used to promote adhesion of elastomeric coatings such as impact-resistant
coatings. Adhesive primer is a coating that:
(i) inhibits corrosion and serves as a primer applied
to bare metal surfaces or prior to adhesive application; or
(ii) is applied to surfaces that can be expected to
contain fuel. Fuel tank coatings are excluded from this category.
(X) Confined space--A space that:
(i) is large enough and so configured that a person
can bodily enter and perform assigned work;
(ii) has limited or restricted means for entry or exit
(for example, fuel tanks, fuel vessels, and other spaces that have
limited means of entry); and
(iii) is not suitable for continuous occupancy.
(Y) Corrosion prevention compound--A coating system
or compound that provides corrosion protection by displacing water
and penetrating mating surfaces, forming a protective barrier between
the metal surface and moisture. Coatings containing oils or waxes
are excluded from this category.
(Z) Critical use and line sealer maskant--A temporary
coating, not covered under other maskant categories, used to protect
selected areas of aerospace parts from strong acid or alkaline solutions
such as those used in anodizing, plating, chemical milling and processing
of magnesium, titanium, or high-strength steel, high-precision aluminum
chemical milling of deep cuts, and aluminum chemical milling of complex
shapes. Materials used for repairs or to bridge gaps left by scribing
operations (i.e., line sealer) are also included in this category.
(AA) Cryogenic flexible primer--A primer designed to
provide corrosion resistance, flexibility, and adhesion of subsequent
coating systems when exposed to loads up to and surpassing the yield
point of the substrate at cryogenic temperatures (-275 degrees Fahrenheit
and below).
(BB) Cryoprotective coating--A coating that insulates
cryogenic or subcooled surfaces to limit propellant boil-off, maintain
structural integrity of metallic structures during ascent or re-entry,
and prevent ice formation.
(CC) Cyanoacrylate adhesive--A fast-setting, single
component adhesive that cures at room temperature. Also known as "super
glue."
(DD) Dry lubricative material--A coating consisting
of lauric acid, cetyl alcohol, waxes, or other noncross linked or
resin-bound materials that act as a dry lubricant.
(EE) Electric or radiation-effect coating--A coating
or coating system engineered to interact, through absorption or reflection,
with specific regions of the electromagnetic energy spectrum, such
as the ultraviolet, visible, infrared, or microwave regions. Uses
include, but are not limited to, lightning strike protection, electromagnetic
pulse (EMP) protection, and radar avoidance. Coatings that have been
designated as "classified" by the Department of Defense are excluded.
(FF) Electrostatic discharge and electromagnetic interference
coating--A coating applied to space vehicles, missiles, aircraft radomes,
and helicopter blades to disperse static energy or reduce electromagnetic
interference.
(GG) Elevated-temperature Skydrol-resistant commercial
primer--A primer applied primarily to commercial aircraft (or commercial
aircraft adapted for military use) that must withstand immersion in
phosphate-ester hydraulic fluid (Skydrol 500b or equivalent) at the
elevated temperature of 150 degrees Fahrenheit for 1,000 hours.
(HH) Epoxy polyamide topcoat--A coating used where
harder films are required or in some areas where engraving is accomplished
in camouflage colors.
(II) Fire-resistant (interior) coating--For civilian
aircraft, fire-resistant interior coatings are used on passenger cabin
interior parts that are subject to the FAA fireworthiness requirements.
For military aircraft, fire-resistant interior coatings are used on
parts that are subject to the flammability requirements of MIL-STD-1630A
and MIL-A-87721. For space applications, these coatings are used on
parts that are subject to the flammability requirements of SE-R-0006
and SSP 30233.
(JJ) Flexible primer--A primer that meets flexibility
requirements such as those needed for adhesive bond primed fastener
heads or on surfaces expected to contain fuel. The flexible coating
is required because it provides a compatible, flexible substrate over
bonded sheet rubber and rubber-type coatings as well as a flexible
bridge between the fasteners, skin, and skin-to-skin joints on outer
aircraft skins. This flexible bridge allows more topcoat flexibility
around fasteners and decreases the chance of the topcoat cracking
around the fasteners. The result is better corrosion resistance.
(KK) Flight test coating--A coating applied to aircraft
other than missiles or single-use aircraft prior to flight testing
to protect the aircraft from corrosion and to provide required marking
during flight test evaluation.
(LL) Flush cleaning--Removal of contaminants such as
dirt, grease, oil, and coatings from an aerospace vehicle or component
or coating equipment by passing solvent over, into, or through the
item being cleaned. The solvent may simply be poured into the item
being cleaned and then drained, or assisted by air or hydraulic pressure,
or by pumping. Hand-wipe cleaning operations where wiping, scrubbing,
mopping, or other hand action are used are not included.
(MM) Fuel tank adhesive--An adhesive used to bond components
exposed to fuel and must be compatible with fuel tank coatings.
(NN) Fuel tank coating--A coating applied to fuel tank
components for the purpose of corrosion and/or bacterial growth inhibition
and to assure sealant adhesion in extreme environmental conditions.
(OO) Grams of VOC per liter of coating (less water
and less exempt solvent)--The weight of VOC per combined volume of
total volatiles and coating solids, less water and exempt compounds.
Can be calculated by the following equation:
Attached Graphic
(PP) Hand-wipe cleaning operation--Removing contaminants
such as dirt, grease, oil, and coatings from an aerospace vehicle
or component by physically rubbing it with a material such as a rag,
paper, or cotton swab that has been moistened with a cleaning solvent.
(QQ) High temperature coating--A coating designed to
withstand temperatures of more than 350 degrees Fahrenheit.
(RR) Hydrocarbon-based cleaning solvent--A solvent
which is composed of VOC (photochemically reactive hydrocarbons) and/or
oxygenated hydrocarbons, has a maximum vapor pressure of seven millimeters
of mercury (mm Hg) at 20 degrees Celsius (68 degrees Fahrenheit),
and contains no hazardous air pollutant (HAP) identified in the 1990
Amendments to the Federal Clean Air Act (FCAA), §112(b).
(SS) Insulation covering--Material that is applied
to foam insulation to protect the insulation from mechanical or environmental
damage.
(TT) Intermediate release coating--A thin coating
applied beneath topcoats to assist in removing the topcoat in depainting
operations and generally to allow the use of less hazardous depainting
methods.
(UU) Lacquer--A clear or pigmented coating formulated
with a nitrocellulose or synthetic resin to dry by evaporation without
a chemical reaction. Lacquers are resoluble in their original solvent.
(VV) Limited access space--Internal surfaces or passages
of an aerospace vehicle or component that cannot be reached without
the aid of an airbrush or a spray gun extension for the application
of coatings.
(WW) Metalized epoxy coating--A coating that contains
relatively large quantities of metallic pigmentation for appearance
and/or added protection.
(XX) Mold release--A coating applied to a mold surface
to prevent the molded piece from sticking to the mold as it is removed.
(YY) Monthly weighted average--The total weight of
VOC emission from all coatings divided by the total volume of those
coatings (minus water and exempt solvents) delivered to the application
system each calendar month. Coatings shall not be combined for purposes
of calculating the monthly weighted average. In addition, determination
of compliance is based on each individual coating operation.
(ZZ) Nonstructural adhesive--An adhesive that bonds
nonload bearing aerospace components in noncritical applications and
is not covered in any other specialty adhesive categories.
(AAA) Operating parameter value--A minimum or maximum
value established for a control equipment or process parameter that,
if achieved by itself or in combination with one or more other operating
parameter values, determines that an owner or operator has continued
to comply with an applicable emission limitation.
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