| (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.
(BBB) Optical antireflection coating--A coating with
a low reflectance in the infrared and visible wavelength ranges that
is used for antireflection on or near optical and laser hardware.
(CCC) Part marking coating--Coatings or inks used to
make identifying markings on materials, components, and/or assemblies
of aerospace vehicles. These markings may be either permanent or temporary.
(DDD) Pretreatment coating--An organic coating that
contains at least 0.5% acids by weight and is applied directly to
metal or composite surfaces to provide surface etching, corrosion
resistance, adhesion, and ease of stripping.
(EEE) Primer--The first layer and any subsequent layers
of identically formulated coating applied to the surface of an aerospace
vehicle or component. Primers are typically used for corrosion prevention,
protection from the environment, functional fluid resistance, and
adhesion of subsequent coatings. Primers that are defined as specialty
coatings are not included under this definition.
(FFF) Radome--The nonmetallic protective housing for
electromagnetic transmitters and receivers (e.g., radar, electronic
countermeasures, etc.).
(GGG) Rain erosion-resistant coating--A coating or
coating system used to protect the leading edges of parts such as
flaps, stabilizers, radomes, engine inlet nacelles, etc. against erosion
caused by rain impact during flight.
(HHH) Research and development--An operation whose
primary purpose is for research and development of new processes and
products and that is conducted under the close supervision of technically
trained personnel and is not involved in the manufacture of final
or intermediate products for commercial purposes, except in a de minimis
manner.
(III) Rocket motor bonding adhesive--An adhesive used
in rocket motor bonding applications.
(JJJ) Rocket motor nozzle coating--A catalyzed epoxy
coating system used in elevated temperature applications on rocket
motor nozzles.
(KKK) Rubber-based adhesive--A quick setting contact
cement that provides a strong, yet flexible bond between two mating
surfaces that may be of dissimilar materials.
(LLL) Scale inhibitor--A coating that is applied to
the surface of a part prior to thermal processing to inhibit the formation
of scale.
(MMM) Screen print ink--An ink used in screen printing
processes during fabrication of decorative laminates and decals.
(NNN) Sealant--A material used to prevent the intrusion
of water, fuel, air, or other liquids or solids from certain areas
of aerospace vehicles or components. There are two categories of sealants:
extrudable/rollable/brushable sealants and sprayable sealants.
(OOO) Seal coat maskant--An overcoat applied over a
maskant to improve abrasion and chemical resistance during production
operations.
(PPP) Self-priming topcoat--A topcoat that is applied
directly to an uncoated aerospace vehicle or component for purposes
of corrosion prevention, environmental protection, and functional
fluid resistance. More than one layer of identical coating formulation
may be applied to the vehicle or component.
(QQQ) Semiaqueous cleaning solvent--A solution in which
water is a primary ingredient. More than 60% by volume of the solvent
solution as applied must be water.
(RRR) Silicone insulation material--An insulating material
applied to exterior metal surfaces for protection from high temperatures
caused by atmospheric friction or engine exhaust. These materials
differ from ablative coatings in that they are not "sacrificial."
(SSS) Solid film lubricant--A very thin coating consisting
of a binder system containing as its chief pigment material one or
more of the following: molybdenum, graphite, polytetrafluoroethylene,
or other solids that act as a dry lubricant between faying (i.e.,
closely or tightly fitting) surfaces.
(TTT) Space vehicle--A man-made device, either manned
or unmanned, designed for operation beyond earth's atmosphere. This
definition includes integral equipment such as models, mock-ups, prototypes,
molds, jigs, tooling, hardware jackets, and test coupons. Also included
is auxiliary equipment associated with test, transport, and storage,
that through contamination can compromise the space vehicle performance.
Cont'd... |
