Aircraft Finishes Flashcards
Name the health and safety precautions to be observed in operating a dope room, including storage of material
Well lighted and ventilated
stored in fireproof containers
Dope and paint rooms are in seperate building
What primer is used when maximum protection of the metal is desired?
Epoxy
What type of test can be performed to identify existing paint finishes?
Apply small amount on engine oil - Nitrocellulose will soften, Acrylic and epoxy will have no effect
MEK will pick up pigment from acrylic finish and not epoxy
What causes blushing when applying dope or lacquer and how can it be prevented?
When doping is accomplished under humid conditions (moisture in the air supply)
Heating the room decreases humidity
What is the purpose of using fungicidal dope when finishing aircraft fabric?
To prevent micro-biological deterioration (rotting) of the fabric
What are the identification marking requirements for United States registered fixed wing aircraft?
Capital ‘N’
Both sides of fuselage on both sides
12 inches
What should the color of registration markings be?
color markings should be contrast their background
What are two types of dope used for aircraft finishes?
Nitrate and Butyrate
What is the advantage of butyrate over nitrate?
Less flammable
What would happen if dope was ever used over paint or enamel?
Tendency to lift and remove such materials
What is applied to metallic surfaces as a common resistant covering before the application of enamel or lacquer?
Zinc Chromate primer is normally used for this purpose
What can be done to the surface of components to prevent filiform corrosion?
primer is completely cured
What are the most common methods of applying aircraft finishes?
dipping, brushing and spraying
What type of paint may be used over any paint systems that is in good condition?
Epoxy topcoats will adhere to all paint systems
What normally causes runs and sags in a spray application of a paint?
Holding the gun too long in one place or holding the gun too close
What causes an ‘orange peel’ or ‘‘pebble’ finish?
Incorrect spray gun setting, incorrect air pressure, incorrect paint viscosity and holding the gun too far from the work
What causes fisheyes in the paint?
Surface contamination
What is used to thin chromate primer?
Toulene
Which Federal Regulation prescribes the size and location requirements for aircraft identification numbers?
FAR Part 45
What type of materials should be thoroughly protected when using paint remover?
Synthetic rubber surfaces, aircraft tires, fabric and acrylics
What instructions should be followed when covering an aircraft with materials specified in STC?
Instructions are included in the STC
What is the principal cause of filiform corrosion?
Uncured primer
What is zinc chromate used for?
Primer for bare metal
What does paint blushing look like?
Dull and hazy surface finish
What causes paint dust?
Poor surface prep and overspray
What types of paint are generally used on aircraft?
Epoxy and enamel
