05-40
CORROSION PREVENTION
05-40 CORROSION PREVENTION
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 by products from highly stressed steel components (main gear steel
spring) requires particular care.
(b) For aluminum parts, treatment consists in mechanically removing as much as pos-
sible corrosion by products, applying corrosion inhibitor and replacing original finish.
Steel wool, emery or steel brushes (unless stainless steel) along with other highly abra-
sive material should not be used since steel or emery particles become embedded in the
softer material causing corrosion.
After cleaning surface corrosion, parts must be treated with an anti-corrosion product.
Tecnam suggests for steel and aluminum parts as anticorrosion product, ACF-50 or
products with similar technical features, which stops the existing corrosion and remain
effective for 24 months.
In low Salt or low Humidity Environments the ACF-50 have to be used every 24
months to prevent the presence of corrosion on aircraft. If the aircraft flies in high Salt
environments refer to the unscheduled maintenance and follow the application intervals.
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