Tecnam P92 Echo Super, Руководство по обслуживанию

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P92 Echo Super
Maintenance Manual
18
Revision Date: 10-29-2007
Revision Number: 3.01
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3.7 Corrosion Prevention
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It is important to keep the aircraft clean and to remove any collection of corrosive agents such as oil, grease, dregs and
other foreign matter. To avoid damage to finish, do not use polishing detergents.
Original or equivalent corrosion prevention must be re-applied after any alteration or repair.
If any trace of corrosion is detected it should be removed as soon as possible and part should be immediately treated to
prevent further corrosion.
(a) For
steel parts , with the exception of highly stressed components or stainless steel, it is possible to use abrasives, power
brushes, steel brushes if operated manually and steel wool.
Removing corrosion byproducts from highly stressed steel components (main gear steel spring) requires particular care.
(b) For
aluminum parts
, treatment consists in mechanically removing as much as possible corrosion byproducts, applying
corrosion inhibitor and replacing original finish.
Steel wool, emery or steel brushes (unless stainless steel) along with other highly abrasive material should not be used sinc e
steel or emery particles become embedded in the softer material causing corrosion.
After cleaning surface corrosion, parts must be treated with an anti-corrosion finish prepared as follows:
4 liter solution containing 10% chromic acid with 20 drops of battery electrolyte. Accurate brushing with a sturdy fiber
brush will rid most of the corrosion and insure that the anti-corrosion agent will penetrate completely in the cracks.
Leave the chromic acid solution on the part for at least five minutes and then remove excess with water or a damp cloth.
Apply protective finish the same day in which treatment begins.
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3.8 Service Directives
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