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9/8/98 AC 43.13-1B SECTION 4. CORROSION PREVENTIVE MAINTENANCE 6-50. GUIDELINES: ALL AIRCRAFT. Corrosion prevention depends on a compre hensive prevention and control plan, imple mented from the start of operation of an air craft, which includes: a. Adequately-trained personnel in (1) recognition of corrosion-inducing conditions; (2) corrosion identification techniques; (3) corrosion detection, cleaning, and treating; and (4) lubrication and preservation of air craft structure and components. b. Inspection for corrosion on a sched uled basis. c. Thorough cleaning, inspection, lubri cation, and preservation at prescribed intervals. d. Prompt corrosion treatment after de tection. e. Accurate record-keeping and report ing of material or design deficiencies to the manufacturer and the Federal Aviation Ad ministration (FAA). f. Use of appropriate materials, equip ment, and technical publications. g. Maintenance of the basic finish sys tems. h. Keeping drain holes and passages open and functional. Sealants, leveling com pounds, miscellaneous debris, or corrosion in hibitors should not block drain paths. i. Replacing deteriorated or damaged gaskets and sealants (using non-corrosive type sealants) to avoid water intrusion and entrap ment that leads to corrosion. j. Minimizing the exposure of aircraft to adverse environments by keeping the aircraft in a hangar. k. Periodic and frequent inspection of areas where there are foamed plastics or other absorbent material. l. Daily draining of fuel cavities to re move accumulated water and other foreign matter. m. Daily wipe-down of exposed critical surfaces of hydraulic cylinders. 6-51. GUIDELINES: AIRCRAFT OP- ERATING OVER SALT WATER. In addi tion to the inspection and treatment prescribed above, the following treatment shall be ap plied: a. Remove all traces of salt water and salt water residue by thoroughly washing the air craft with fresh water. (1) After drying, coat the propeller, hubs, blades and other unpainted or unpro tected parts of the engine and its installation parts by spraying or rubbing lightly with corro sion preventive compound, Specification MIL-C-16173, Grade 4. (2) Apply this mixture on parts that move or require some lubrication and on all fittings subject to corrosion such as landing gear retracting plungers, control surface hinges, control cables, exposed rivets and bolts, and other similar parts not protected by Par 6-50 Page 6-13PDF Image | AFS-640
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