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Effects of area relationships in dissimilar metal contacts
SURFACE MAINTENANCE

Aviation Maintenance Ratings - Aviation theories and other practices
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and instructions. This information is constantly revised to give you up-to-date knowledge and procedures. You can find the following sources of information on corrosion in your unit’s technical library or corrosion control work center. Aircraft Weapons System Cleaning and Corrosion Control for Organizational and Intermediate Maintenance Levels, NAVAIR 01-1 A-509 Avionics Cleaning and Corrosion Prevention/ Control, NAVAIR l6-l-540 Preservation of Naval Aircraft, NAVAIR 15-01-500 Chart-Corrosion Preventive Compounds used by Naval Air Systems Command, NAVAIR 01-l A-518 General use of Cements, Sealants, and Coatings, NAVAIR 01-1A-507 Ground Support Equipment Cleaning And Corrosion Control, NAVAIR 17-1-125 Corrosion Control, Cleaning, Painting, and Decontamination (One volume of the maintenance instruction manuals (MIMs) for all late model aircraft is devoted to these subjects.) Q4. Q5. Q6. Q7. Q8. Q9. Q10. Q11. Q12. Periodic Maintenance Requirements Cards The decay of metals as they combine with oxygen is known as what type of corrosion? What does an intact coat of paint provide to naval aircraft? In an electrochemical attack, electron flow is established in which direction? How will heat, humidity, and moisture affect the electrochemical reactions that cause metal to corrode? Why are thick structural sections most susceptible to corrosive attack? In relation to corrosion, what affect does moisture have on avionics equipment? Which NAVAIR publication is entitled Aircraft Weapons Systems Cleaning and Corrosion Control? NAVAIR 16-1-540 provides what information? Information on the preservation of Naval aircraft and aircraft engines can be found in what publication? Q13. What information can you find in NAVAIR 01-IA-507? PREVENTIVE MAINTENANCE LEARNING OBJECTIVE: Define the purpose of a preventive maintenance program. “An ounce of prevention is worth a pound of cure.” Where corrosion prevention on naval aircraft is concerned, this is an understatement. Compared to the cost of naval aircraft, the cost of corrosion prevention is small. Preventive maintenance is a powerful tool that can control even the most difficult corrosion problem. Most operating activities increase their corrosion prevention programs to meet severe conditions aboard ship. Then, these programs are decreased in scope when the aircraft is returned to the relatively mild conditions ashore. When corrosion preventive maintenance is neglected because of tactical operating requirements, a period of intensive care should follow to bring the aircraft back up to standard. The two most important factors in preventing corrosion, and the only factors that can be controlled by field personnel, are the removal of the electrolyte and the application of protective coatings. Since the extent of corrosion depends on the length of time electrolytes are in contact with metals, corrosion can be minimized by frequent washing. Prevention also involves the correct and timely use of covers and shrouds, periodic lubrication, and the application of preservatives. Years of experience have proven the need for such measures to keep the aircraft airworthy. When corrosion preventive maintenance is neglected, an aircraft soon becomes unsafe to fly. Squadrons with the best corrosion preventive programs tend to have the best safety records, maximum use of the aircraft, and the lowest operating costs. SUPPORT EQUIPMENT PREVENTIVE MAINTENANCE SCHEDULE The Naval Aviation Maintenance Program (NAMP), OPNAVINST 4790.2, requires SE shops to establish a maintenance schedule for each item of equipment. The SE Custody and Maintenance History Record, OPNAV 4790/51, is used to schedule and record all corrosion maintenance actions. 4-4







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