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60 Cards in this Set

  • Front
  • Back
What is the greatest threat to the structural integrity of an air raft?
metal corrosion
Corrosion is detrimental to the integrity of an aircraft. It alters the structure of the materials that make up the aircraft in what manner?
Reduction in strength and change in mechanical characteristics
The materials used in the construction of an aircraft are chosen according to their
Weight to strength ratio.
Metal corrosion is defined as the deterioration of metal as it combines with what element?
Oxygen
On naval aircraft, what materials are used most often to separate susceptible alloys from the corrosive environment?
Paints
Describe the flow of electrons during electrochemical attack of a metal.
Electrons flow from the anodic area to the cathodic area, resulting in the deterioration of the anodic area.
What conditions are factors in the electrochemical reaction that causes metals to corrode?
Heat, humidity, and moisture
Because of variations in their composition, which of the following aircraft surfaces is the most susceptible to corrosive attack?
thick structural
What condition is the single greatest contributor to avionics corrosion?
moisture
What publication provides information on aircraft corrosion control for organizational-level maintenance?
NA-01-1a-509
What publication provides information on aircraft cleaning?
NA-01-1a-509
What publication provides information on avionics corrosion prevention and control?
NA-01-1a-509
What publication provides information on the preservation of naval aircraft and aircraft engines?
NA-15-01-500
What publication provides information on the general use of cements, sealants, and coatings used on aircraft?
NA-01-1a-507
When carrier-based aircraft are transferred to shore activities, what happens to the scope of most corrosion preventive programs?
It decreases
Normally, aircraft squadrons with the best corrosion preventive programs have what benefits?
The best safety records, the most use of the aircraft, and the lowest operating cost
As directed by NAVAIR, aircraft deployed aboard an aircraft carrier will be washed and cleaned a minimum of how often?
every 7 days
Mandatory aircraft cleaning is always required after an aircraft is exposed to what substances?
Fire-extinguishing materials splashed on the landing gear.
Unpainted surface of struts and actuating cylinder rods should be cleaned or wiped down at what prescribed interval?
daily
When handling, using, and storing aircraft cleaning materials, what is/are the most serious hazards you will meet?
flammability and toxicity
When using hazardous chemicals, you should wear what protective devices?
Gloves and aprons, a face shield, and an approved respirator.
Solvents must be kept in specially marked containers if they contain more than what percent by volume of chlorinated materials?
24%
When volatile and flammable materials are not being used, they should be stored in what areas?
Inside a separate building or flammable liquids storeroom.
What solvent is generally used as an all purpose cleaner in naval aviation maintenance?
Dry-cleaning solvent
What solvent is an alternative compound for cleaning acrylics?
aliphatic naptha
Safety solvent is intended for use when a high flash point is required. You should NOT use safety solvent to clean what areas of the aircraft?
oxygen systems
To neutralize the effects of urine and waste products in the lavatories of aircraft, you should use what cleaning agents?
Ammonium hydroxide or sodium bicarbonate
In an intermediate maintenance activity, an avionics/electrical maintenance branch that operates a "clean room" should use what type of MIL-C-81302 Freon cleaner?
I
To produce a high-luster, long-lasting polish on an unpainted aluminum clad surface, you should use what mechanical cleaner?
Aluminum metal polish
What devices should you use to perform a fast and economical cleaning of an aircraft?
Conformable applicators
What is the first step you must take before you clean an aircraft?
Select the correct cleaning agent for the method of cleaning that you will use.
What cleaning compound should be used to clean an aircraft that is painted with the tactical paint system?
MIL-C-85570
Surfaces that are lightly soiled with oil may be spot-cleaned by wiping them with what substance?
Dry cleaning solvent
Where should you place the cowling and access panels when they are removed during a maintenance task?
on a pad or secure them to the aircraft
The size and composition of an emergency reclamation team is determined by what criteria?
Urgency of the situation.
Under what condition is an aircraft most susceptible to a corrosive attack?
When it is not being flown or when it is in shipment.
How many levels of preservation methods are used on naval aircraft?
3
Level III preservation is used to preserve aircraft for what situation?
long-term storage
Level I preservation shall be applied to an aircraft when it is out-of-service for more than what minimum number of days?
14
What publication contains the requirements for Level I preservation?
Special MRC
What is the main disadvantage of grade IV corrosion preventive compound?
It is easily removed by water spray
What preservative compound should be used to provide protection for shock struts?
Corrosion-preventive petroleum, class 3
Piano-wire hinges require lubricating and corrosion protection. What water-displacing, low-temperature, lubricating should you use?
VV-L-800
You should use corrosion preventive compound MIL-C-81309, type III, on what equipment?
Avionic and electrical equipment
Corrosion may occur in several forms, depending on what factors?
Metal involved, atmospheric conditions, and corrosion-producing agents present.
Threadlike filaments that form under organic substances (such as paint film)
Filiform corrossion
Fungus growths on the sealing materials of integral fuel tanks?
microbiological corrosion
Slipping movement between two mating metal surfaces?
fretting corrosion
Uniform etching of the metal surfaces?
direct surface attack
Shallow indentations or deep cavities of small diameter that form on metal surfaces?
pitting corrosion
Caused by the difference in concentration of the electrolyte or the active metal on the anode and cathode?
crevice attack
Corrosive attack along the grain boundaries of a metal alloy?
Intergranular corrosion
Metal fractures caused by the combined effects of corrosion and stress applied in cycles to a part?
Fatigue corrosion
Dissimilar metals in contact in a corrosive medium, such as salt water?
galvanic corrosion
Lifting up of the metal surface caused by the force of expanding corrosion preducts occurring at the grain boundaries just below the metal surface?
exfoliation corrosion
To identify all the corrosion-prone areas of your squadron's aircraft, you should refer to what publication?
PMIC
When avionic and structural corrosion is compared, what effect is the main difference between avionic and structural corrosion?
Small amounts of corrosion can make avionic systems inoperable
Before performing any maintenance on avionic or electrical systems, you should make sure that you have completed what actions?
Secure all external electrical power.
What type of corrosion is usually found around electrical bonding and grounding straps?
Galvanic
What is the purpose of chemically treating a surface after the removal of corrosion products?
To increase the surfaces resistance to corrosion and improve the paint bond to the surface.