ATA 54

Aviation Services Unlimited has found excessive corrosion on the trailing edge of the engine pylon while performing the 200 hour inspections. In some cases, the trailing edge stiffener has broken into several pieces due to the severe corrosion. The main problem with this corrosion is the dissimilar metals being used in the assembly of the pylon trailing edge. If the corrosion is found early enough the trailing edge stiffeners can be removed, cleaned, treated, primed and than re-installed.